BOUGHT:   19 Dec 87 Symmetric Computer Systems Inc (Calif.) (Bankrupt ~1989).
 HARDWARE: NS32016 11.0592 MHz, Ethernet, 3 (+1) * 70M ST506 Discs, 5.25"+3.5"
	   Floppies,  Parallel printer, 4 ttys, 50M SCSI Cassette Streamer.
 BINUTILS NEVER COMPILED (gprof ld size nm strip ar ranlib)

SYMMETRIC TECHNICAL HISTORY by JHS
--------------------------------------------------------------------------------
88-01-28 Symmetric Model 375. Serial 375-8712-10134 delivered.
	by Federal Express +49 89 3113026
	said I'll have to pay tax on $8970 4.9% + 14%
	floppy drive mains cable: white goes to fuse, then switch
--------------------------------------------------------------------------------
FIXED:	Bad blocks in original /lib/libc.a & /vmunix symbol table,
	pjc replaced disc these disc files from tape:
1989 aprox
	* b 2 0 3 0
		gets to SWAP 0.0M <CR>, then reads disv forever, & kills
		floppy sn 5 bn 5, fixed with
	# disklabel /dev/rfdc0 floppy
		fd0a: 5 * 1024 63 labeloffset=800
	/usr/spool/lpj created
	mode & owner: /dev/rmt1 & nrmt1
	chmod < 755 > 6755 /etc/shutdown
	ln -s /usr/p/src/public/pdtar/tar.1 /usr/man/man1/pdtar.1
	ln -s /usr/p/src/public/pdtar/tar.5 /usr/man/man5/pdtar.5
--------------------------------------------------------------------------------
88-05-13 I booted /vmunix.new
su
cd /usr
nohup tar c . &
ps lax /vmunix
panic ......
dumping to dev1 offset 1904
(savecore count field dev 0,196 this error may have arisen earlier)
dump device bad
loading /boot
I rebooted standard kernel,
couldnt access tape drive with tar
reboot with reset button,
hung after printing
	sba0:
book indicated this was calculating scsi address,
assumed scsi hardware locked in bad state,
powered off,
standard automatic reboot via power on,
once again tape drive usable

with our own kernel we generated 3-89, when used tape drive got
	intlevelabort lppl 4 pc 4d91 addr 0 msr 1e70809Q
--------------------------------------------------------------------------------
90-04-02
Sym wouldnt get beyond saying 4.3M swap,
fsck wd0a
	I=1348
fsck wd0c
	I=1348
tarred root to tape 5 & verified

insert my boot tape
cd /mnt/tmp
skip files (not using count=1)
restore xvfh /dev/rmt8 stand etc
	only created dirs, not files
restore xvf /dev/rmt8 stand etc
	only created etc/nulib dir, not files
restore tvf /dev/rmt8 shows files are on tape
rm /mnt/restoresymtab
rmdir stand etc/nulib etc
restore xvf /dev/rmt8 stand etc
--------------------------------------------------------------------------------
notes on visit to franks ethernet
137.2
0x2000089 qa2
Class A,b,c	b==128,c==192
Odysseus
	is franks leased sun running 4.3
	/dev/rst0 for bsd 4.3 tapes
	/dev/rst8 for Appollo tapes
	login fl
/usr/julian/src 17.8M uncompressed, 10.4M compressed
frank was using tar cvfBb20
ftp 368641 bytes to sym resulted in 1 more byte on Sym than Sun ARGH!
--------------------------------------------------------------------------------
90-10-11	My reconfigurable kernel with correct timezone and 1.4Mdrive
		support has problems with tape driver,
		testblock -v, + find / results in
			1) /dev/console not echoing a couple of characters,
			2 then system hanging, HEXLED=6,
		necessitating a cold boot.
================================================================================
JHS Symmetric log typed in 901122
Dates start in 1st column,
Input commands to monitor or shell start in 2nd column, as do status changes
	such as connect/disconnect, power on/off, dil strap changes,
	shell command indicated with a #, monitor commands with a *,
Output from computer starts in 3rd column.
Where a significat conclusion/ lesson is learnt, it is marked "LESSON:"

DATES	| INPUT | OUTPUT FROM COMPUTER

901118	FAULT DEBUG AFTER CONNECTING JORDAN'S MICROPOLIS DISC
	TO SYMMETRIC WITH MY MINISCRIBE AS INTERNAL DRIVE 0
	(wrongly, with attenuators on both, cable screw ups + disconnects,
	caused bad writes to be reported on /dev/console).

	Old winchester (Miniscribe 85) on external cable,
	Micropolis not connected.
		MON 1.11
		boot error (no_id)
		E UND
		*
	Old winchester moved back to internal ribbon.
	Normal boot:
		sba0
		sba0:
		swap 4.3M
		wd0a: hard read error sn 2348 bn 4696 status 59
			<seekdone,drq,err error 40 <uncorr>
		dev = 0x0 ino=0 fs=/
	Boot Single User From Floppy
	* b 2 0 3 0
	# bad144 -s /dev/wd0a
		wd0c: sn 2348 bn 4696 status 59 <seekdone,drq,err>
			error 40 <uncorr>
		2348
		2349
		wd0c: sn 34896 bn 69792 status 59 <seekdone,drq,err>
			error 40 <uncorr>
		34896
		34897
	# ls vmunix, vmunix.scs, vmunix.jhs exit
	# bad144 -s /dev/rwd0h
		2348
		34896
	# cat /mnt/etc/showbadblocks
		#!/bin/sh
		for m in wd0a wd0h
		do
			b = `bad144 $m`
			c = `icheck -bn $b $m`
			echo "Filen on "$m" overlaying current bad blocks"
			ncheck -i $i $m
		done
901118
	# icheck -b 2348 2349 34896 34897 /dev/wd0a
		(sector nos. above correspond to block nos. such as 4696 41568)
	# bad144 -s /dev/wd0h
		wd0c:hard read error, sn 2348 bn 4696 status 59
			<seekdone,drq,err> error 40 <uncorr>
		2348
		wd0c:hard read error, sn 2348 bn 4696 status 59
			<seekdone,drq,err> error 40 <uncorr>
		2349
		wd0c:hard read error, sn 11825 bn 23650 status 59
			<seekdone,drq,err> error 40 <uncorr>
		11824
		11825
		wd0c:hard read error, sn 34896 bn 69792 status 59
			<seekdone,drq,err> error 40 <uncorr>
		34896
		34897
	# bad144 -s /dev/rwd0b
		2348
		11825
		34896
901119
	# bad144 -S -f /dev/rwd0c
		wd0c:hard read error, sn 2348 bn 4696 status 59
			<seekdone,drq,err> error 40 <uncorr>
		2348
		34896
	# bad144 -S /dev/rwd0c
		2348
		34896
	# bad144 -S /dev/rwd0c
		2348
		34896
	LESSON: bad144 -S does not automatically remove bad sectors,
		despite what manual says.
	# bad144 -s -a -v -S /dev/rwd0c
		hard read error sn 2348 bn 4696
		2348
		hard read error sn 34896 bn 69792
		34896
	# bad144 /dev/rwd0c
		  814
		  860
		14252
		14540
		14680
		14684
		60454
		60598
		84854
901119
	Cold Reboot
	# bad144 /dev/rwd0c
	Tested to see if disc was actually writing
	# mount /dev/wd0a /mnt
	# ls /etc > /mnt/write_test
	# sync
	# halt -n
	* b 2 0 3 0
	# mount /dev/wd0a /mnt
	# cat /mnt/write_test
		Concluded writing OK
	# bad144 -a -v /dev/rwd0c 2348 34896
		Had 9 sectors, adding 2
		copying 73710 to 73708
		zeroing 73709
		copying 73711 to 73710
		copying 73712 to 73711
		copying 73713 to 73712
		copying 73714 to 73713
		copying 73715 to 73714
		copying 73716 to 73715
		zeroing 73716
		write badsect file at 73719 73721 73723 73725 73727
901119
	# bad144 /dev/rwd0c
		  814
		  860
		 4696	bn, corresponds to sn 2348
		14252
		14540
		14680
		14684
		60454
		60598
		69792	bn, corresponds to sn 34896
		84854
	LESSON: -S does not work, must specify sectors manually
		on the command line
	# bad144 -s /dev/rwd0c
		no errors reported
	# icheck -bn 4696 69792 /dev/wd0a
	# mount /dev/wd0a /mnt
	# cd /mnt/etc
	# showbadblocks > /tmp/show.rslt &
	# sync
	# fsck /dev/rwd0a
		I=480 NAME=/bin/ar	SIZE=0 REMOVE ? y
		I=    NAME=/bin/true	SIZE=0 REMOVE ? y
		I=    NAME=/bin/cat	SIZE=0 REMOVE ? y
		I=    NAME=/bin/cc	SIZE=0 REMOVE ? y
		I=    NAME=/bin/chmod	SIZE=0 REMOVE ? y
		I=    NAME=/bin/chgrp	SIZE=0 REMOVE ? y
		I=    NAME=/bin/cmp	SIZE=0 REMOVE ? y
		I=    NAME=/bin/date	SIZE=0 REMOVE ? y
		Free inode  count wrong in superblock fix y
		bad cylinder groups salvage y
	# fsck /dev/rwd0a
	# fsck /dev/rwd0h
		size = 0 remove y
			/genix/src/cmd/sccs/lib/sid_ab.c.Z
			/p/src/vsl/lft/code/tools
		link count dir i=824 count=7 should be 6
		unref file=4680 recon several more
		free inode count adjust bad cyl groups salvage y
	# fsck /dev/rwd0h
		bin/cmp vmunix vmunix.scs
		dev = 0x0 ino=38, fs=mnt
		panic ifree freeing free inode
		syncing disc
				This crash was probably because floppy
				fs holding cmp was damaged.
	Auto reboot
	Manually restored from root dump:
		/bin/ar,true,cat,cc,chmod,chgrp,cmp,date,
901120
	Attempt to format Micropolis
	Miniscribe diconnected (except power & LED)
	Micropolis on external socket with earth strap
	Autoloading /vmunix
	boot error (no_id)
	E UND
	* b 2 0 3 0
	boot error (no_id)
	E UND
	Micropolis power off
	* b 2 0 3 0
		booted up single user ok
	LESSON: leave power off as monitor tries to access winchester before
		floppy, getting confused.
	# dd if=/dev/rwd1a of=/dev/null count=10
		wd1: read label status 59 <seekdone,drq,err> error 10 <no_id>
	# format
		drive		1
		cylinders	1024
		tracks/cylinder 8
		sectors/track	9		(Ive tried more this is max)
		bytes/sector	1024
		pre comp	CR
		size of a	50
		offset a	0
		size b		0
			c	0
			d	0
			e	0
			f	0
			g	0
			h	0
		interleave	CR
		head switch,sectors(3):CR		(what is this ?)
		format or verify f
		start cyl	0
		end  cyl	99
		start track	0
		en  track	7
		install bootstrap n	(cos. read error on bootstrap with y)
		pack label	jordan
		drive serial no 9999
		use ecc 	y
		bytes in gap

	LESSON: from chuck: each winch has its own data lines, not daisy
		chained ! (only control is daisy) need to connect correct
		data lines.
	Got Miniscribe working on /dev/wd1a external socket, mounted
		filesystem, powered with new pack, & earth lead.
	Jordan says drive last used as 8 head 1024 b/sec by michael.
901120 18:00
	Tried to format Micropolis on I.'s AT, he thought he'd done it,
	but on returning I saw the strap on the DS2 selector, so cant have!
	(also wasnt slow enough).
	Tried to use dd & disklabel - failed.
901121
	* b 3 0 3
	wd3a:/stand/format
	Micropolis power on., no W1 or	W2 straps in place, DS2 strap in.
	format
		drive		1
		cylinders	1024
		tracks/cylinder 8
		sectors/track	9		(Ive tried more this is max)
		bytes/sector	1024
		pre comp	CR
		size of a	50
		offset a	0
		size b		0
			c	0
			d	0
			e	0
			f	0
			g	0
			h	0
		interleave	CR
		head switch,sectors(3):CR		(what is this ?)
		format or verify f
		start cyl	0
		end  cyl	CR
		start track	0
		en  track	7
		install bootstrap n	(cos. read error on bootstrap with y)
		pack label	"jhs 901121 12:48"
		drive serial no 1
		use ecc 	y
		bytes in gap (3) CR
		Cylinder 1023
		writing empty bad-sector tables at sector 73719
	#wd3a/vmunix
	LESSON: learnt that stand alone formatter works ok
	# disklabel /dev/rwd1c
		error 0
	# bad144 /dev/rwd1c
		bad pack magic number (pack is unlabelled)
	# disklabel wd1 miniscribe85 jordan /stand/bootwd
		write error
	# disklabel /dev/rwd1a miniscribe85 jordan /stand/bootwd
	# disklabel /dev/rwd1a
		lists plausible information
	# bad144 /dev/rwd1c
		lists nothing
	# bad144 -s /dev/rwd1c
		no errors reported
	Top of drive visible list:
		Hd	Cyl	BFIND
		0	1022	8982..
		5	 978	9981
		1	 877	9449..
		5	1023	6366
		2	1015	 455..
		6	1021	3901
		3	 619	7744.
		7	 321	8032..
		5	 595	5102
		7	 394	8840..
	# dd if=/dev/wd1c of=/dev/null
		147456+0 records in & out	note 8*9*1024=73728,
							73728 * 2 = 147456
	# sync
	# halt
	Jordans disc connected as external,+ scs/miniscribe on internal
	Booted
		_____r (and possibly write errors)
	disconnected jordans drive
		wd0: read error sector 92 status 0x59 sector 0x1
		bn 184 directory read error
	Boot
		Symmetric 32000 Monitor (1.11) 375(root) 1/11/88 23:34:34
		E SVC
		b 2 0 3 0
		boot error (abort)
		E UND
	Disconnected my winchester, couldnt get * prompt with reset.
	Connected Jordan's, left mine disconnected, gto * prompt
	* b 2 0 3 0
		loading wd3a:/boot
		Boot:/vmunix
		wd3:read error:sector 8, status 0x59, error 0x10
	# bad144  -s /dev/rwd0c
		wd0c hard read error sn 92 bn 184 error1<no_dam>
		92
	# bad144 -a -v /dev/rwd0c 92
	# fsck /dev/rwd0a
		Inode 2 Dir Salvage
		Inode 3 Dir unreferenced reconnect y SORRY NO lost+found
			directory
		1345
		 896
			fsck then reported lots more damage on root
	# fsck /dev/rwd0h - all OK
	# fsck /dev/rwd0a - HUNDREDS OF FIXES !, no lost+found directory,
						so everything lost
		Emptied the root !
	Removed Jordan's attenuator, Started to rebuild root
	# newfs -N -v /dev/rwd0a miniscribe85
	# mount /dev/wd0h /mnt
	# mount /dev/wd0a /mnt2
	# rm /tmp ; ln -s /mnt/tmp /tmp
	cd /mnt2
	/mnt/ucb/zcat /mnt/p/adm/distrib_tape/root_fs.Z | restore rf -
	sync
	fsck /dev/rwd0a
		OK
	halt
	RESET
		loading /boot
		Bad Format
	*b 3 0 3
		wd0a:/vmunix
	^D
		login
	root
	cd /usr/p/adm/bak
	tar cf - . | ( cd / ; tar xf - )
	reboot
	cd /dev
	MAKEDEV all labels
	disklabel /dev/rwd0c miniscribe85 1 /stand/bootwd
		THIS SUCCEEDED IN INSTALLING BOOT ON WD
	reboot
	mv hosts.equiv hosts.equiv.orig
	mv termcap termcap.orig
	termcap
90-11-22
	Changed jordan's strap to ds2 from ds1
	observed no straps on w1 & w2
	removed resistor pack on Jordans drive
	Jordan power on, Sym power on
	booted no problems.
	mkdir /p2a /p2b /p2h
	mount /dev/wd1a /p2a
		error from winch cant remember
	halt
	b
		swap 4.3M
		wdoa: hard read error sn 6988 bn 13976 status 59
			<seekdone,drq,err> error 40 <uncorr>
		Printer daemon started
		wd0h: hard read error sn 55664 bn 83104 dev=0x7,ion=0 fs=/asr
		panic ifree: freeing inode. syncing disk loadimg wd0a:/boot
		wd0:read error sector 28 status 0x59 error 0x40
		cant read root inode boot failed.
	Tried to boot of floppy
	b 2 0 3 0 Failed
	disconnected Jordan's floppy
	Tried to boot of floppy, failed
	Disconnected my winchester control plug
	* b 2 0 3 0 1
	# bad144 -s /dev/rwd0cA
		hard read error sn 28 bn 56
		28
				sn 6988 bn 13976
		6988
				sn 55664 bn 111328
		55664
				sn 64912 bn 129824
		64912
	# mount /dev/wd0a /mnt
	# cd /mnt/etc
		wd0a: hard read error sn 28 bn 56
		panic
		Reset
	* b 2 0 3 0
	# bad144 -a -v /dev/rwd0c 28 6988 55664 64912
	# fsck /dev/rwd0a
		Phase 2
		ROOT INODE UNALLOCATED TERMINATING
	# fsck /dev/rwd0h
		unallocated inode SIZE=0 Remove y
		/bin/minix1.1
		/genix/src/cmd/ddt/bpt.h.Z parse.c.Z atrun.c.Z basename.c.Z
			/lib/libsrc/f..cmp.c.Z /libplot/t450
			/p/src/local/nroff/cmdtab.c.Z
			/p/src/vsl/lft/doc/lft.mac.Z
					lfta.rof.Z
					lftie.rof.Z
					lfts.rof.Z
			lots of files reconnected
			Reconnected Jordans Winch
	# halt -n
	* b 2 0 3 0
	hung
	disconnected jordan's winch
	* b 2 0 3 0
	# mount /dev/wd0a /mnt
	# ls /mnt - empty !
	# halt -n
	* b 2 0 3 0
	# newfs -N -v /dev/rwd0 miniscribe85
	# mount /dev/wd0a /mnt
	# mount /dev/wd0h /mnt2
	# ls /mnt /ucb /z*
		panic ifree freeing free inodes
		boot failed
	* b 2 0 3 0
	# fsck /dev/rfd0
	# halt -n
	* b 2 0 3 0
	# cp /dev/null /etc/mtab
	# mount /dev/wd0a /mnt ; mount /dev/wd0h /mnt2
	# cd /mnt
		dev=0x0 ino=2 fs=/mnt
		panic ifree freeing free inodes
	* b 2 0 3 0
	# fsck /dev/rfd0 - No errors
	# newfs -v /dev/rwd0a miniscribe85
90-11-22 14:57
	# cp /dev/null /etc/mtab
	# mount /dev/wd0a /mnt
	# mount /dev/wd0h /mnt2
	# cd /mnt ; ls
	# ln -s /mnt2/tmp /tmp
	# /mnt2/ucb/zcat /mnt2/p/adm/dis*/roo*Z | restore xf -
	# halt
	* b
		Auto reboot in progress
		/dev/wd0a: 304 files
		wd0h: hard read error sn 18768 bn 9312 <uncorr>
		/dev/rwd0h: cannot read blk 9312
			unexpected incosistency, run fsck manually
	# bad144 -s /dev/rwd0c
		sn 18768 bn 37536
		18768
	# halt
	* b 2 0 3 0
	# icheck /dev/rwd0h -bn 18768
		didnt understand what it said
	# bad144 -a /dev/rwd0c 18768
	# fsck /dev/rwd0h
		cg 2:bad magic number,
		4 blocks missing, bad cyl groups, salvage y
	# fsck /dev/rwd0h
		OK no errs
	# mount /dev/wd0h /mnt ; cd /mnt
	# tar cBf /dev/rcst2 . &	to tape 12
	when power to jordans drive off, all accesses to miniscribe winch fail.
	tar failed to stat many files, (even though superuser)
	# halt
	* b 2 0 3 0
	# disklabel /dev/rwd0c	OK
	# disklabel /dev/rwd1c	hard read error sn 0 bn 0
	# dd if=/dev/rwd1c of=null bs=1024
		hard read error ...
	Power OFF, ON, Jordans on 0.5 secs after scs
		Autoboot RC/fsck said
		Cannot read block 56 run fsck manually
	# halt
	* b
		Cannot read block 56 run fsck manually
	 The 12V supply to the microscribe is 12.65 V (the new supply is 10.85V)
	 # fsck -y /dev/rwd0h
		loads of errors - Phase 2 unallocated root inode
	* b 3 0 3
	Formatted my drive just like jordans,
		except pack label "901122 julian"
		drive serial number 0
		started at 21:00, finished before 22:35
	# disklabel /dev/rwd0c miniscribe85 "901122 julian" /stand/bootwd
		write error 0
	# disklabel /dev/rwd0c miniscribe85 "901122 julian" /stand/bootwd
	# sync
	# bad144 -s /dev/rwd0c
		bad pack magic number (pack is unlabelled)
	# disklabel /dev/wd0a miniscribe85 0 /stand/bootwd
	# disklabel /dev/wd0a
		info shown
	# disklabel /dev/wd0c
		info shown
	powered up & connected jordans drive
	# disklabel /dev/wd0h
		pack is unlabelled
	# disklabel /dev/wd0h miniscribe85
	# disklabel /dev/wd1a
		hard read error
	# disklabel /dev/wd1a  miniscribe85 1 /stand/boot
		wd1a: hard write error
	^C
	halt
	* b 3 0 3
		wd3a:/stand/format	on jordans first 5 cylinders
	# disklabel /dev/wd1a miniscribe85 1 /stand/bootwd
		wd3a:/vmunix
	# disklabel /dev/wd1a miniscribe85 1 /stand/bootwd
	# disklabel /dev/wd1h miniscribe85
		wd1h: hard write error.
	# bad144 -s /dev/rwd0c
		wd0c soft ecc error	sn 30227 bn 60454
					sn 30299 bn 60598
	# bad144
		showed nothing
		< more dosklabels, newfs, restore in this area>
	# dd if=/dev/rwd0c of=/dev/null bs=512 count=100 skip=60450
		invalid argument, takes a long time
	# dd if=/dev/rwd0c of=/dev/null bs=1024 count=100 skip=30210
		<takes a long time, then provokes same ecc error as above>
	# bad144 -a -v /dev/rwd0c 30227 30299
	# dd as above
		no error reported thus proved not necessary to reboot,
		despite man 8 bad144 saying it is necessary to reboot
		before it takes effect
	# newfs -v -S 1024 -m 5 /dev/wd0a miniscribe 85
		wd0a hard write error sn 9791 bn 19582
	# bad144 -s /dev/rwd0a	OK, no errors
	# newfs -v -S 1024 -m 5 /dev/wd0a miniscribe 85
		wd0a hard read error sn 24 bn 48
	Jordans power off
	# newfs -v -S 1024 -m 5 /dev/wd0a miniscribe 85
		wd0a hard write error sn 9791 bn 19582
	disconnected jordans drive
	# newfs -v -S 1024 -m 5 /dev/wd0a miniscribe 85
		ran ok no errors
	# halt
	* b 3 0 3
		wd3a:/stand/format
			connected micropolis & powered up
			drive: 1
			install bootstrap:n
			pack label:"001123 02:11"
			drive serial no:1
			ecc:y
			cylinder 1023
			writing bad sector tables at sector 73719
	* wd3a:/vmunix
	# disklabel /dev/wd1a miniscribe85 /stand/bootwd
	# disklabel /dev/wd1b miniscribe85
	# disklabel /dev/wd1c miniscribe85
		shows plausible table
	# disklable /dev/wd1h
		Bad pack magic number (pack is unlabeled)
	# disklable /dev/wd1h miniscribe85
	# bad144 -s /dev/wd1c
		wd1c: soft ecc sn 61273 bn 122546
	# dd if=/dev/rwd1c of=/dev/null bs=1024 skip=61260 count=30
		wd1c: soft ecc sn 61273 bn 122546
	# bad144 -a -v /dev/rwd1c 61273
		had 0 bad sectors, adding 1
		zeroing 73718
		write badsect file at 73719 73721 73723 73725 73727
	# bad144 -s /dev/rwd0c
		no errors reported
	Removed micropolis, added W2 strap
	# dd if=/dev/rwd0a bs=1024 of=/dev/null
		wd0: read label: status 59<seekdone,drq,err> error 10<no_id>
		wd0a: hard read error sn 0 bn 0 status 59<seekdone,drq,err>
			error10<no_id>
		read: I/O error
		0+0 records in
		0+0 records out
	# dd if=/dev/rwd1a bs=1024 of=/dev/null
		wd0: recal: status 1<err> error 4<abort>
		wd1a:hard read error sn 0 bn 0 status 59<seekdone,drq,err>
			error10<no_id>
		read: I/O error
		0+0 records in
		0+0 records out
	# halt
	Symmetric Power Off
	Discovered I had forgotten micropolis power, connected it
	* b 2 0 3 0
	# dd if=/dev/rwd0a bs=1024 of=/dev/null count=100
		100+0 records in
		100+0 records out
	# dd if=/dev/rwd1a bs=1024 of=/dev/null count=500
		500+0 records in
		500+0 records out
	# dd if=/dev/rwd0a of=/dev/rwd1a bs=1024
		9792+0 records in
		9792+0 records out
	Examined tape headers
		tape 3 Sat nov 17 03:00
		tape 2 fri nov 16 03:00
		tape 1 tue nov 13 16:47
	# dd if=/dev/nrcst2
	# newfs -v -S 1024 -m 5 /dev/wd1h miniscribe85
	# mount /dev/wd1h /mnt2
	# cd /mnt2
	# tar xfB /dev/rcst2 &
		../julian files couldnt be restored
		(because many megabytes cant fit on a floppy)
	# newfs -v -S 1024 -m 5 /dev/wd1a miniscribe85
	# newfs -v -S 1024 -m 5 /dev/wd1b miniscribe85
-	-	-	-	-	-	-	-	-	-
	# cd /
	# restorefmtape
		(1) Init wd0a
			seemed to run OK
		(2) 1804+7 records in
		    1804+0 records out		<------ SUSPICIOUS
		    Warning: ./lost+found: File exists
		(3) Init wd0h
			seemed to run OK
		(4) Extract usr fs from tape
			Mount vol 2 then type return CR
			Mount vol 3 then type return CR <--- TAPE CONTENT !=
							WHAT SH SCRIPT EXPECTS
	# halt
	* b 2
		Running on miniscribe root
	# disklabel /dev/wd0a		display looks plausible
	# disklabel /dev/wd0b		display looks plausible
	# disklabel /dev/wd0c		display looks plausible
	# disklabel /dev/wd0h		display looks plausible
	# disklabel /dev/wd1a		display looks plausible
	# disklabel /dev/wd1b		display looks plausible
	# disklabel /dev/wd1c		display looks plausible
	# disklabel /dev/wd1h		display looks plausible
	Later	/dev/wd0b currently containing root, use tunefs to 5%
	# newfs -v -m 5 /dev/wd0b miniscribe85
	# newfs -v -m 5 /dev/wd0h miniscribe85
	# newfs -v -m 5 /dev/wd1a miniscribe85
	# newfs -v -m 5 /dev/wd1b miniscribe85
	Later	/dev/wd1h currently containing bits of /p, use tunefs to 5%
	dd if=/dev/nrcst2 of=/dev/null files=9
		9542+10 records in
		9543+1 records out
		restor rf /dev/rcst2
-	-	-	-	-	-	-	-	-	-
901127 17:30 (aprox)
	Installed a 3 disc system that works (at last)
	previously i had installed a DS3 data cable that shorted all the pins
	between the WD controller, and a micropolis drive, (I had not realised
	there was an there earth plane on the back of the ribbon),
	once earth plane, removed everything worked OK.
	bad144 -s /dev/wd[02][abh] started
901127 18:34
	bad144 -s /dev/rwd[0-2]A[abh]
		wd0c: soft ecc sn 42427 bn 84854
		wd0c: soft ecc sn  3551 bn 7102
		wd0c: soft ecc sn 42427 bn 84854
		wd0h: soft ecc sn 42427 bn 56630
		wd0h: soft ecc sn 42427 bn 56630
		wd0c: soft ecc sn 42427 bn 84854
		wd0h: soft ecc sn 42427 bn 56630
		wd0h: soft ecc sn 42427 bn 56630

	with drive 2 mounted:
	newfs /dev/wd2a miniscribe85 /stand/bootwd
	newfs /dev/wd2b miniscribe85
	newfs /dev/wd2h miniscribe85
	/root (all bar dev) tar copied to /wd2a
	/usr tar copied to /wd2h
901128
	Normal operation (restoring damaged files, checking everything,
	shuffling files about.
		wd0a: soft ecc sn 3551 bn 7102
901128 17:59
		wd0a: soft ecc sn 3551 bn 7102
	22:00
		wd0h: soft ecc sn 42427 bn 56630
================================================================================
901129 ~22:30
	Preparing to remove Jordans drive (with bulk disc data erase),
			and replace by one of mine:
		umount of wd1[abh]
		newfs wd1[abh]
		mount of wd1[abh]
		testblock of /wd1[abh]
	removal of jordans drive,
	replacement with seagate, which reported bad sector table scrambled,
	LATER: a reformat should clear this sometime.
901129 23:50
	reboot
	Discovered (by using mount) that my badly edited new /etc/fstab had
	mounted wd0h, wd1h, wd2h, all succesively on top of each other
	not sure if ive done a reboot allowing this fstab to work its ruin,
	but for the record, the datestamp of /etc/fstab was
		-rw-r--r--  1 root	    169 Nov 28 11:04 /etc/fstab.nasty
	and contents were:
		/dev/wd0a:/:rw:60:1
		/dev/wd0h:/usr:rw:30:2
		/dev/wd1a:/:rw:60:3
		/dev/wd1b:/:rw:60:4
		/dev/wd1h:/usr:rw:30:2
		/dev/wd2a:/:rw:60:3
		/dev/wd2b:/:rw:60:4
		/dev/wd2h:/usr:rw:30:2
	Mount did not show multiple 1a or 2a mounted on root (thank goodness)
	I also did
		newfs /dev/rwd1a miniscribe85 /stand/bootwd
		newfs /dev/rwd1b miniscribe85
		newfs /dev/rwd1h miniscribe85
	and discovered newfs doesnt complain about unreadable boot files,
	so /dev/wd2a needs testing, as it may not actually have a valid
	primary boot, wrong syntax not detected was
		newfs /dev/rwd1a miniscribe85 /stand/wdboot
	bad144 -s /dev/rwd1c > ~julian/tmp/rwd1c_bad144.log was started
		log file after: 0 size
		rwd1c: soft ecc error sn23033 bn 46066
		rwd1c: soft ecc error sn41985 bn 83970
		rwd1c: soft ecc error sn52208 bn104416
		rwd1c: soft ecc error sn67756 bn135512
		 wd1c: soft ecc error sn52208 bn104416
	sh: bad144 -s /dev/rwd1c 2>> ~julian/tmp/rwd1c_bad144.log was started
		log size still 0
	To try and sort out the file overlay mess, the following was done:
		cd /wd1h ; tar x (with tape 12)
			read 5M then failed, try again later
		cd /wd1h/tape_12 ; tar xBf /dev/rmt8 (with tape 12)
		cd /wd2h ; find . -type f -exec \
			/usr/p/julian/bin/equ_rm /usr . {} \;
		cd /wd2a ; find . -type f -exec \
			/usr/p/julian/bin/equ_rm / . {} \;
	bad144 -a /dev/rwd1c 23033 41985 52208 67756
	bad144 /dev/rwd1c
		46066
		83970
		104416
		135512
	newfs /dev/rwd1a miniscribe85 /stand/bootwd
	newfs /dev/rwd1b miniscribe85
	newfs /dev/rwd1h miniscribe85
	mount /dev/wd1a /wd1a
	mount /dev/wd1b /wd1b
	mount /dev/wd1h /wd1h
		wd0h: soft ecc error sn42427 bn56630
	diff /usr/adm/shutdownlog shutdownlog > t
		< 22:52  Thu Nov 29, 1990.  Halted.
		> 23:37  Thu Nov 29, 1990.  Halted.
		ie wd0ah log did not know of the 23:37 shutdown
	previous entry for both wd0h and wd2h was
		07:07  Tue Nov 27, 1990.  Halted.
	wd2h:~adm/txt/technical.log held nothing that this file did not also hold
	wd0h: soft ecc error sn42427 bn56630
	wd1h: soft ecc error sn41985 bn55746
901204	wd0h: soft ecc error sn42427 bn56630

901212
	halt
	power on symmetric left on
	extension chassis power off
	drive 1 bearing contact bent to avoid squeak
	extension chassis power on
	b
		/dev/rwd1h:
			unref dir i=11672 owner=julian mode=40755
			size=512 mtime=dec 8 11:51 1990 (reconnected)
			dir i=11672 connected. parent was i=4617
			link count dir i=4617 owner=root mode=40755
			size=512 mtime=dec 9 22:39 1990 count 3 should be 2
				(adjusted)
			link count dir i=11672 owner=julian mode=40755
			size=512 mtime=dec 8 11:51 1990 count 1 should be 2
			unexpected inmconsistency; run fsck manually
	halt
	b
		/dev/rwd1h
			BAD INODE NUMBER FOR '..' I=11672 OWNER=julian
				MODE=40755
			SIZE=512 MTIME=Dec 8 11:51 1990
			DIR=/lost+found/#11672
	cd /etc ; mv fstab fstab.moved ; cp fstab.single fstab
	halt
	b
		Up multi user on one disc.
	fsck /dev/rwd1h
		Phase 2 - Check Pathnames
			BAD INODE NUMBER FOR '..' I=11672 OWNER=julian
				MODE=40755
			SIZE=512 MTIME=Dec 8 11:51 1990
			DIR=/lost+found/#11672
			FIX
		y
			DIRECTORY CORRUPTED I=926 OWNER=root MODE=40755
			SIZE=12288 MTIME=Dec 9 11:30 1990
			DIR=/lost+found
			SALVAGE
		y
			Phase 4 - Check Reference Counts
			LINK COUNT DIR I=11672 OWNER=julian MODE=40755
			SIZE=512 MTIME=Dec 8 11:51 1990 COUNT 1 SHOULD BE 2
			ADJUST
		y
	fsck /dev/rwd1h
			DIRECTORY CORRUPTED I=926 OWNER=root MODE=40755
			SIZE=12288 MTIME=Dec 9 11:30 1990
			DIR=/lost+found
			SALVAGE
		y
	fsck /dev/rwd1h
			DIRECTORY CORRUPTED I=926 OWNER=root MODE=40755
			SIZE=12288 MTIME=Dec 9 11:30 1990
			DIR=/lost+found
			SALVAGE
		y
		newfs /dev/rwd2h miniscribe85
	mount /dev/wd1a /wd1a
	mount /dev/wd1b /wd1b
	mount /dev/wd1h /wd1h
	mount /dev/wd2a /wd2a
	mount /dev/wd2b /wd2b
	mount /dev/wd2h /wd2h
	(cd /wd1h ; ~local/pdtar -c -b 4 -f - . ) | ( cd /wd2h ; tar xplf - )
	du -s /wd1h /wd2h
		wd1h	38435
		wd2h	38426
	cd /wd1h
	find . -type f -exec ~local/cmp -d {} /wd2h \;
	find . -type l -exec rm {} \;
	find . -type d -exec rmdir {} \; several times
		nothing left (as expected)
	umount /dev/wd1h
	umount /dev/wd1b
	umount /dev/wd1a
	newfs -v -m 5 /dev/rwd1h miniscribe85
	newfs -v -m 5 /dev/rwd1b miniscribe85
	newfs -v -m 5 /dev/rwd1a miniscribe85 /stand/bootwd
	bad144 -a /dev/rwd1c 16522 23033 24039 41985 52208 53553 67756 72355
	bad144 /dev/rwd1c
		33044
		46066
		46066
		48078
		83970
		83970
		104416
		104416
		107106
		135512
		135512
		144710
	bad144 /dev/rwd1c 123456789
901226 ~22:00
	<attempt to write drive serial number>
	bad144 /dev/rwd1c
		just next prompt came, thus this failed to write 123456789
		as drive serial number
	bad144 /dev/rwd1h
	bad144 -s /dev/rwd1c
		nothing reported on control screen, but dev/console received
		wd1c: soft ecc sn 24039 bn 48078
	bad144 -a -f -c /dev/rwd1c 24039
	bad144 /dev/rwd1c
		48078
	fsck /dev/wd1h	OK
	fsck /dev/wd1b	OK
	fsck /dev/wd1a	OK
	cat /etc/showbadblocks
	cd /dev
	sh
	b=`bad144 wd0h`
	echo $b
		32230 32374
	i=`icheck -bn $b wd0h`
		7196 32230 arg; frag 3 of 4, inode=0, class=free block
	ncheck -i 0 wd0h	<-- syntax from 4.3 book size manual
		ncheck: cannot open /dev/r0
		full list of all inodes on /usr followed !
	ncheck -i wd0h 0
		long wait
		full list of all inodes on /usr followed !
901213
	~julian/bin/u2
	newfs -v -m 5 /dev/rwd2h miniscribe85
	newfs -v -m 5 /dev/rwd2b miniscribe85
	newfs -v -m 5 /dev/rwd2a miniscribe85 /stand/bootwd
	~julian/bin/m2
910101
	# umount /dev/wd1a
	# umount /dev/wd1b
	# umount /dev/wd1h
	# umount /dev/wd2a
	# umount /dev/wd2b
	# umount /dev/wd2h
	# tunefs -m 0 /dev/wd1a
	# tunefs -m 0 /dev/wd1b
	# tunefs -m 0 /dev/wd1h
	# tunefs -m 0 /dev/wd2a
	# tunefs -m 0 /dev/wd2b
	# tunefs -m 0 /dev/wd2h
	# halt
	* b 2					boot single user
	# tunefs -m 0 /dev/rwd0h
	# tunefs -m 0 /dev/rwd0a
	# halt -n				halt no flush of superblock
	* b
	# halt
		Installed Seagate drive in place of /dev/wd1
	* b 2
		bad144 /dev/rwd1c
			scrambled table reported
		bad144 -f /dev/rwd1c 100
			format errors in bad block area
	* b 3
	Boot: wd0a:/stand/format
		Drive				1
		Cylinders			1024
		Tracks/cyl			9
		Secs				9
		Bytes/Sec			1024
		Precomp (1023 if none)		1023
		Partition A Size		0 same for b-h
		Interleave factor, n:1 (3):	CR
		head switch, sectors (3):	CR
		format or verify:		f
		verify after			y
		Install bootstrap:		y
			read error on bootstrap
		pack label (up to 16 chars):	"Julian H. Stacey"
		driver serial number		72696739
		use ECC 			y
		format y/n			y
	started 17:00
	cabinet tempreature 26 centigrade
		Cylinder 810
		wd1: read error: sector 65795 status 0x59 error 0x40
		Cylinder 812, track 2, read error
		Cylinder 1023
		1 track with errors
		writing bad sector table at sector 82935
	finished 18:30
	Power Off, term resistor pack removed, earth strap added
		Drive				1
		Cylinders			1024
		Tracks/cyl			9
		Secs				9
		Bytes/Sec			1024
		Precomp (1023 if none)		CR
		Partition A Size		CR same for b-h
		Interleave factor, n:1 (3):	CR
		head switch, sectors (3):	CR
		format or verify:		f
		verify after			y
		Install bootstrap:		n
		pack label (up to 16 chars):	"ST4096 Stacey"
		driver serial number		72696739
		use ECC 			y
		format y/n			y
		Cylinder 1023
		writing bad sector table at sector 82935
		Drive				-1
	wd0a:/vmunix
	# disklabel /dev/wd1c seagate
	# disklabel /dev/wd1a seagate /stand/bootwd
	# newfs -v -m 0 /dev/rwd1a seagate /stand/bootwd
		For some reason couldnt write the disc pack
		(even after power off), so reformatted 1st 10 cylinders
	# newfs -v -m 0 /dev/rwd1a jhs /stand/bootwd
	# disklabel /dev/rwd1a jhs /stand/bootwd
		jhs|Seagate ST4096 96Mb:ty=st506:se#1024:nt#9:ns#9:nc#1024:\
			:pa#82701:oa#0:\
			:pb#0:ob#0:\
			:pc#82944:oc#0:\
			:ph#0:oh#0:
		see /etc/disktab file for more observations
	-	-	-	-	-	-	-	-	-
900102	Removal of bad blocks (ecc detected over the last month or two)
	/usr/adm/messages preened to produce:-
		Occurences	Error
		11	wd0a: soft ecc sn 3551 bn 7102
		15	wd0h: soft ecc sn 42427 bn 56630

		3	wd1h: hard read error, sn 72867 bn 117510
		2	wd1h: soft read error, sn 71932 bn 115640
		5	wd1c: hard read error, sn 65795 bn 131590
		2	wd1c: soft ecc sn 67756 bn 135512
		2	wd1h: soft ecc sn 53553 bn 78882
		2	wd1h: soft read error, sn 73224 bn 118224
		4	wd1h: soft read error, sn 71715 bn 115206
		2	wd1c: soft ecc sn 23033 bn 46066
		2	wd1h: soft read error, sn 73155 bn 118086
		3	wd1c: soft ecc sn 24039 bn 48078

		2	wd2h: soft ecc sn 22945 bn 17666

		Seagate temporary disc:
			2	wd1a: soft ecc sn 55043 bn 110086
			2	wd1c: soft read error, sn 65795 bn 131590
	-	-	-	-	-	-
	# icheck -bn 7102 /dev/rwd0a
	# ncheck -i 509 /dev/rwd0a
	# cp /bin/passwd /bin/passwd.jhs
		bn 7102 error appears on /dev/console
	# halt
	* b 2
	# bad144 -a -v -c /dev/rwd0a 3551
		had 2 bad sectors, adding 1
		copying 73717 to 73716
		copying 73718 to 73717
		copying  3551 to 73718
		writing bad sector file at 73719 73721 73723 73725 73727
	# halt -n
	* b
		fsck /dev/wd0a:
		Unreferenced file I=633 Mode=100600, Owner=Root, removed
	I looked in /lost+found, not there,
	- check root inode 633 from tape, /dev/wd0g, I probably deleted this
		when rebuilding system after last crash (11/12-90), so this
		inode 633 is just a random file .... forget it.
	-	-	-	-	-	-
	# icheck -bn 56630 /dev/rwd0h
	# ncheck -i 12453 /dev/rwd0h
	# cat /usr/man/man2/sigvec.2 > /dev/null
		no errors on /dev/console, so assumed OK
	-	-	-	-	-	-
	# icheck -bn 17666 /dev/rwd2h
		23594
	# ncheck -i 23594 /dev/rwd2h
		/wd2h/GNU/epoch/epoch-3.1.tar.Z
	# cp /wd2h/GNU/epoch/epoch-3.1.tar.Z /usr/tmp/poch31
		no errors detected, so assumed OK
	-	-	-	-	-	-
	# icheck -bn 110086 /dev/rwd1a
		free block
	# bad144 -a -v /dev/rwd1a 55043
		had 0 bad sectors, adding 1
		zeroing 82934
		write badsect file at 82935 82937 82939 82941 82943
	-	-	-	-	-	-
	# icheck -bn 131590 /dev/rwd1a
		free block
	# bad144 -a -v /dev/rwd1a 65795
		had 1 bad sectors, adding 1
		zeroing 82933
		write badsect file at 82935 82937 82939 82941 82943
	-	-	-	-	-	-
910103	The seagate drive is now ready for use, its empty,
	with bad blocks mapped out.
	-	-	-	-	-	-
	# date > fastboot
	# halt
	Seagate removed, micropolis installed on wd1.
	* b
	# fsck /dev/wd[12][abh] OK
	# ln /etc/fstab.triple /etc/fstab
	# bad144 -s /dev/rwd1c
910111	Removing 2 troublesome sectors /usr/adm/messages excerpt appended:
		Jan  5 01:40 wd0h: soft ecc sn 42427 bn 56630
		Jan  8 14:10 wd0h: soft ecc sn 42427 bn 56630
		Jan  8 16:40 wd0h: soft ecc sn 58574 bn 88924
		Jan 11 11:10 wd0h: soft ecc sn 58574 bn 88924
	# icheck -bn 56630 88924 /dev/wd0h
	# ncheck -i 12389 16565 /dev/wd0h
	# cp /julian/delivery/exe/old/rm.exe ~julian/tmp
	# cp /usr/julian/delivery/exe/old/rm.exe ~julian/tmp
	# cp /usr/man/man2/fsync.2 ~julian/tmp
	# halt
	* b
	% cmp ~julian/tmp/* appropriate_files ... all ok, no differences
900126	/etc/myname content changed from qa2 to vsl
Jan 16 11:20	wd1h: soft ecc sn 41985 bn 55746
Jan 28 01:40	wd1h: soft ecc sn 53553 bn 78882
Feb 18 13:00	wd0h: soft ecc sn 30371 bn 32518
910214	seagate as drive 1, to transfer data via jkh
	While moving around drives, i believe a data socket with short pins
	on wd2 caused disc hard errors to accumulate.
910216
	# bad144 -s /dev/rwd0c
		7047 7048 7049 7050 7051 7052 7053 7054 7055
		(dev console reported hard read errs on
		sn 7047..7055, &
		bn 14094,14096,14098,14100,14102,14104,14106,14108,14100
	/etc/disktab (miniscribe85) specifies that there are 9 sectors/track
	& 8 tracks/cylinder,
	Assuming cylinders are numbered 0 to 1023, & tracks 0 to 7:
	rwd0c
		7047 / 9 = 783; 783 / 8 = 97.8 ; 97 * 8 * 9 = 6984 ;
		7047 - 6984 = 63 ; 63 / 9 = 7;
		Thus need to format cylinder 97 track 7.
	-	-	-	-	-	-	-	-	-
	# bad144 -s /dev/rwd2c
		30
		54 55 56 57 58 59 60 61 62
		63 64 65 66 67 68 69 70 71
	rwd2c cylinder 0 tracks 6 & 7 need reformating, &
		sn 30 bn 60 to be patched out.
		sn 8 bn 16
		sn 9280 bn 18560 sn 73719 bn 147438 sn 73721 bn 147442
		sn 73723 bn 147446 sn 73725 bn 147450 sn 73727 bn 147454
	Note bad sector replacements are stored in
		73719 73721 73723 73725 73727
	so now these are bad, it seems safest to dump data to tape,
	reformat, restore, i guess patching out could be dodgy.
	# bad144 -a -v /dev/rwd2c 30
		bad144: /dev/rwd2c: cant read bad block info
	# halt
	* b 2
	^D (reboot)
	# format
		drive 2
		Install bootstrap ? y
		read error on bootstrap
	# disklabel /dev/rwd2c micropolis /stand/bootwd
	# disklabel /dev/rwd2h micropolis
	# disklabel /dev/rwd2h
	# newfs -v -m 0 /dev/rwd2h micropolis
	# bad144 -s /dev/rwd2c
	I seemed to lose space using the micropolis disktab entry, I only got
	slightly more for the whole disc, than for the H partition of a
	miniscribe, so for now ive reverted to miniscribe.
	# disklabel /dev/rwd2c miniscribe85 /stand/bootwd
	# disklabel /dev/rwd2a miniscribe85
	# disklabel /dev/rwd2b miniscribe85
	# disklabel /dev/rwd2h miniscribe85
	# disklabel /dev/rwd2h
	# newfs -v -m 0 /dev/rwd2a miniscribe85
	# newfs -v -m 0 /dev/rwd2b miniscribe85
	# newfs -v -m 0 /dev/rwd2h miniscribe85

	Alternate way of finding used bad sectors:
	# sh
	# nohup find / -type f -print  -exec cp {} /dev/null \;
	Read nohup.out, confirmed manually:
	-rwxr-xr-x  1 root	   1207 Apr  7	1987 nu.cf.debug*
	# cp /etc/nulib/nu.cf.debug /dev/null
		wd0a: hard read error sn 7052 bn 14104
	-rwxr-xr-x  1 root	   1274 Aug  9	1987 nu.cf.real*
	# cp /etc/nulib/nu.cf.real /dev/null
		wd0a: hard read error sn 7054 bn 14108
910226
	# bad144 -l /dev/rwd0c
		7102 60454 60598 84854 117148
910226		---------------------------------
# /etc/icheck -b numbers -bn numbers /dev/rwd0a

# reported in /usr/adm/messages (produced by bad144 -s /dev/rwd0c):
#	err on sn  7047  7048  7049  7050  7051  7052  7053  7054  7055
#	err on bn 14094 14096 14098 14100 14102 14104 14106 14108 14110

# icheck -bn 7047 7048 7049 7050 7051 7052 7053 7054 7055 /dev/rwd0a
	505 505 505 505 505 505 505 505 506
# icheck -bn 14094,14096,14098,14100,14102,14104,14106,14108,14110 /dev/rwd0a
	1442
# icheck -bn 14095,14097,14099,14101,14103,14105,14107,14109,14111 /dev/rwd0a
	1442
# icheck -b 7047 7048 7049 7050 7051 7052 7053 7054 7055 /dev/rwd0a
	/dev/rwd0a:
	7048 arg; frag 0 of 4, inode=505, class=logical data block 2
	7049 arg; frag 0 of 4, inode=505, class=logical data block 2
	7050 arg; frag 1 of 4, inode=505, class=logical data block 2
	7051 arg; frag 1 of 4, inode=505, class=logical data block 2
	7052 arg; frag 2 of 4, inode=505, class=logical data block 2
	7053 arg; frag 2 of 4, inode=505, class=logical data block 2
	7054 arg; frag 3 of 4, inode=505, class=logical data block 2
	7055 arg; frag 3 of 4, inode=505, class=logical data block 2
	7047 arg; frag 3 of 4, inode=506, class=logical data block 1
	bad mode 1359
	bad mode 1360
	files	 719 (r=353,d=32,b=54,c=85,sl=195)
	used	8124 (i=20,ii=0,b=1841,f=680)
	free	1311 (b=319,f=35)
	missing    0
# icheck -b 14094,14096,14098,14100,14102,14104,14106,14108,14110 /dev/rwd0a
	/dev/rwd0a:
	bad mode 1359
	bad mode 1360
	14094 arg; frag 0 of 1, inode=1442, class=logical data block 0
	files	 719 (r=353,d=32,b=54,c=85,sl=195)
	used	8124 (i=20,ii=0,b=1841,f=680)
	free	1311 (b=319,f=35)
	missing    0
# icheck -b 14095,14097,14099,14101,14103,14105,14107,14109,14111 /dev/rwd0a
	/dev/rwd0a:
	bad mode 1359
	bad mode 1360
	14095 arg; frag 0 of 1, inode=1442, class=logical data block 0
	files	 719 (r=353,d=32,b=54,c=85,sl=195)
	used	8124 (i=20,ii=0,b=1841,f=680)
	free	1311 (b=319,f=35)
	missing    0
910228
	restored /etc/nulib/ nu.cf.debug & nu.cf.real from tape distribution,
	rm old copies , that contained 3 512 byte blocks with my
		BAD_BLOCK_DIAGNOSTIC_CREATED_BY_JHS
	diagnostic in each of the 2 files (2*3=6 ==> the rest were unallocated)
910301	wd2h restored from tape, wd2b & wd2a still to consider

910712	wanted large disc to play in, using seagate, noticed no lost+found,
	also it was wd1a, preferred wd1h,
	# disklabel /dev/rwd1c jhs2 /stand/bootwd
	# disklabel /dev/rwd1h jhs2
	# newfs -v -m 0 /dev/rwd1h jhs2 /stand/bootwd
910729	Copying all wd2 trees to seagate, to save space by repartitioning
	# wd2 to one big parttion, instead of 3
	# cptree /wd2[abh] seagate
	# find .. cmp -d
	# disklabel /dev/rwd2c micropolis_a /stand/bootwd
	# disklabel /dev/rwd2a micropolis_a
	reboot (as suggested in disklabel manual, presumably cos kernel
	only loads partition table when it boots, not when it mounts)
	before rebooting i couldnt convice kernel that wd2a was 70M, & not 10M,
	(as it used to be).
	# newfs -v -m 0 /dev/rwd2a micropolis_a /stand/bootwd
	# bad144 -s /dev/rwd2c		no errors reported.
910729	Copying all wd1 trees to seagate, to save space by repartitioning
	tried to reset seagte address to 2, screwewd up,
	narled the disc, reformated first 2 tracks
	# newfs -v -m 0 /dev/rwd2a jhs /stand/bootwd
	sector error, reformated whole disc
		type:	jhs
		interleave:	3
		head switch (sectors):	3
		verify after format:	y
		cyls 0 - 1023
		tracks 0 - 8
		install bootstrap	cr
		pack label:	 seagate julian
		drive serial:		72696739
		ecc:	y
			bad sector table written at 82935
	# newfs -v -m 0 /dev/rwd2a jhs /stand/bootwd
		warning 2 sectors in last cylinder unallocated.
	# bad144 -s /dev/rwd2c		no errors reported.
	# disklabel /dev/rwd1c micropolis_a /stand/bootwd
	# disklabel /dev/rwd1a micropolis_a /stand/bootwd
	# newfs -v -m 0 /dev/rwd1a micropolis_a /stand/bootwd
--------------------------------------------------------------------------------
910912	Received chuck's symmetric pcb's
910914	Repartitioned seagate ready to boot chuck's symmetric.
	Created a new /etc/disktab entry:
		# Cylinder usage: root=120 + swap=54 + usr=847
		seaboot|Seagate ST4096 96Mb bootable made by jhs for chucks symmetric\
				:ty=st506:se#1024:nt#9:ns#9:nc#1024:\
			:pa#9720:oa#0:\
			:pb#4374:ob#120:\
			:pc#82944:oc#0:\
			:pd#0:od#0:\
			:pe#0:oe#0:\
			:pf#0:of#0:\
			:pg#0:og#0:\
			:ph#68607:oh#174:
	disklabel /dev/rwd2c seaboot /stand/bootwd
	disklabel /dev/rwd2b (tried for interest)
		showed errors
	disklabel /dev/rwd2a seaboot
	disklabel /dev/rwd2b seaboot
	disklabel /dev/rwd2h seaboot
	Reboot
	newfs -v -m 0 /dev/rwd2a seaboot /stand/bootwd
	newfs -v -m 0 /dev/rwd2h seaboot /stand/bootwd
	/usr/gnu/bin/tar -c -b 4 -f - . | ( cd /wd2h ; /usr/gnu/bin/tar -x -f - -p -b 4 )
	mkdir /wd2a/dev
	cd /wd2a/dev
	/dev/MAKEDEV standard
	/dev/MAKEDEV wd0
	/dev/MAKEDEV wd0
	/dev/MAKEDEV wd0
	/dev/MAKEDEV wd1
	/dev/MAKEDEV wd2
	/dev/MAKEDEV wd_names
	/dev/MAKEDEV fd0
	/dev/MAKEDEV fd0
	/dev/MAKEDEV fd0
	/dev/MAKEDEV fd1
	/dev/MAKEDEV fd2
	/dev/MAKEDEV fd_long0
	/dev/MAKEDEV fd_long1
	/dev/MAKEDEV fd_long2
	/dev/MAKEDEV pty0
	/dev/MAKEDEV cst2
	cd /
	/usr/gnu/bin/tar -c -b 4 -f - .[a-z]* [a-c]* delivery [e-t]* v* | ( cd /wd2a ; /usr/gnu/bin/tar -x -f - -p -b 4 ) &
--------------------------------------------------------------------------------
910918
	copied my eproms 1.11 1/11/88 to chucks system,
	removed his 1.9 1/6/86 eproms
--------------------------------------------------------------------------------
910920
	edited /etc/myname for 3 machines:
		old 3 disc 375	skier
		new chuck 375	biker
		pc532		surfer
	on skier & biker
		# /usr/lib/sendmail -bz
--------------------------------------------------------------------------------
911006
	created disktab fuji_jhs entry, formatted 2 discs from jkh,
	added to biker
	# umount /dev/wd1a
	# bad144 -l /dev/rwd1c
	# bad144 -l /dev/rwd1a
	# bad144 -a -v -f -c /dev/rwd1c 39127 39226
	# bad144 -l /dev/rwd1c
	# bad144 -l /dev/rwd1a
	# newfs -v -m 0 /dev/rwd1a fuji_jhs
	# bad144 -s /dev/rwd1c
		reported 39127 39226
	# bad144 -s /dev/rwd1a
911014 BIKER
	# bad144 -s /dev/rwd0c
		wd0c: hard read error, sn 65795 bn 131590
	# bad144 -s /dev/rwd1c
		wd1c: soft ecc sn 4057 bn 8114
		wd1c: soft ecc sn 42366 bn 84732
		wd1c: soft ecc sn 47316 bn 94632
		wd1c: soft ecc sn 69193 bn 138386
		wd1c: soft ecc sn 71858 bn 143716
	# bad144 -s /dev/rwd2c
		OK
911113	SKIER
	/usr/adm/messages had many errors in last 2 months on
		wd1a sn 37577 bn 75154
	# bad144 -l /dev/rwd1a
		48078
	# bad144 -a -v -c /dev/rwd1a 37577
		wrote bad sector tables at 73719,73721,73723,73725,73727
	# bad144 -l /dev/rwd1a
		48078 75154
911113	BIKER
	/usr/adm/messages had some errors in last 2 months
		sn 29679	bn 59358
	# bad144 -a -v -c /dev/rwd1c 29679
		sn 65795	bn 131590
	# bad144 -a -v -c /dev/rwd0c 65795
	# halt -n
911202
	# chmod 755 /bin/login (remd s bit
920205	SKIER
	/usr/adm/messages had some repetitive soft ecc errors .....
	# bad144 -l /dev/rwd0c
		  7102
		 60454
		 60598
		 84854
		117148
	# bad144 -l /dev/rwd1c
		 48078
		 75154
	# bad144 -l /dev/rwd2c
		nothing
	# sync
	# kill -1 1
	# sync
	# bad144 -a -v -c /dev/rwd0c 4013 30371
	# bad144 -a -v -c /dev/rwd1c 53553
	# bad144 -a -v -c /dev/rwd2c 22945
	# reboot -n
	# bad144 -l /dev/rwd0c
		7102
		8026
		60454
		60598
		60742
		84854
		117148
	# bad144 -l /dev/rwd1c
		48078
		75154
		107106
	bad144 -l /dev/rwd2c
		45890
920219	SKIER
	/usr/adm/messages had some repetitive wd0h: soft ecc sn 28070 bn 27916
	# bad144 -l /dev/rwd0c
		7102
		8026
		60454
		60598
		60742
		84854
		117148
	# halt
	# bad144 -a -v -c /dev/rwd0c 28070
	# halt -n
	* b
	# bad144 -l /dev/rwd0c
		7102
		8026
		56140
		60454
		60598
		60742
		84854
		117148
BIKER 920319
	# bad144 -a -v -c /dev/rwd1c 41716
		hard read error sn 41716 bn 83432
	# icheck -b 83432 /dev/rwd1a
	# ncheck -i 12692 /dev/rwd1a
		/pc532/rescue/dev_root_911126.Z
	# mount /dev/wd1a /usr1
	# cd /usr1/pc532/rescue
	# zcat dev_root* > /dev/null
		(ie testing to see if compress detects an error)
SKIER 920509
	OBJECT: to test Stuarts control card,
	(Data saved via enet to driver)
	2 MISTAKES MADE:
		- Removed /wd2, Reinstalled with wrong drive id straps
		  (card thought it was drive 2 (of4), isntead of 3
		  (as original card was set to)
		- Also turned off power to wd1 while unix running,
	Result 1:
		wd0a: hard write error sn 4672 bn 9344
		wd0a: hard write error sn 6976 bn 13952
	Result 2:
		boot error (no_id)
		E UND
	System booted ok when wd2 removed,
		(I may not have had power to wd2 turned on, &
		data bus for wd2 on back of skier may have been loose)
	format
		drive=2
		type=micropolis_a
		label=skier_wd2
		serial=229563
SKIER 920510
	newfs -v -m 0 /dev/rwd1a micropolis_a
		This was wrong drive !
		IVE NOW LOST ALL OF WD1 DATA
	umount /dev/wd1a
	newfs -v -m 0 /dev/rwd1a micropolis_a
	newfs -v -m 0 /dev/rwd2a micropolis_a
------------------
	RELOADING FROM TAPE
------------------
	icheck -b 9344 13952 /dev/rwd0a
		/dev/rwd0a:
		9344 arg; frag 0 of 4, inode=992, class=inodes 992-1024
		13952 arg; frag 0 of 4, inode=1344, class=inodes 1344-1376
		bad mode 1359
		bad mode 1360
		files	 614 (r=256,d=21,b=54,c=85,sl=198)
		used	5709 (i=18,ii=0,b=1269,f=561)
		fre
	icheck -bn 9344 13952 /dev/rwd0a
	ncheck -i 992 1344 /dev/rwd0a
		1344	/etc/nulib/.
		992	/etc/hosts.en
SKIER 920618
	Disconnected 220V fan from an adjacent power block,
	Discs made unusual noise, superblocks corrupt - repaired.

	Also decided to fix wd2 problem:
	wd2a: hard read error, sn 32366 bn 64732
	wd2c: hard read error, sn 32367 bn 64734
		status 59<seekdone,drq,err> error 40<uncorr>

	bad144 -s /dev/rwd2c
		32366 32367
	time icheck -bn  64732 64733 64734 64735 /dev/rwd2c
		36.4u 6.4s 2:04 34% 7+95k 2+6io 23pf+0w
	time icheck -bn  64732 64734 /dev/rwd2c
		36.0u 5.8s 2:07 32% 7+95k 3+7io 21pf+0w
		Also printed same list 2 times
	time icheck -b	64732 64733 64734 64735 /dev/rwd2c
		/dev/rwd2c:
	ncheck -i 14400 14401 14402 14403 14404 14405 14406 14407 /dev/rwd2a
		/dev/rwd2a: ncheck: read error 64712
		14404	/910720_cass15/genix_tree/src/cmd/c2
		ncheck: read error 64712
	ncheck -i 14408 14409 14410 14411 14412 14413 14414 14415 /dev/rwd2a
		/dev/rwd2a: ncheck: read error 64712
		14412	/910720_cass15/genix_tree/src/cmd/eqn
	ncheck -i 14416 14417 14418 14419 14420 14421 14422 14423 /dev/rwd2a
		 /dev/rwd2a: ncheck: read error 64712
	ncheck -i 14424 14425 14426 14427 14428 14429 14430 14431 /dev/rwd2a
		/dev/rwd2a: ncheck: read error 64712
	/usr2/910720_cass15/genix_tree/src/cmd/c2 /dev/null
		cp: /usr2/910720_cass15/genix_tree/src/cmd/c2: I/O error
	/usr2/910720_cass15/genix_tree/src/cmd/eqn /dev/null
		cp: /usr2/910720_cass15/genix_tree/src/cmd/eqn: I/O error
	cd /usr2/910720_cass15/genix_tree/src/cmd ; ls -l
		c2 not found
		eqn not found
	bad144 -a -v -c /dev/rwd2c 32366 32367
		Had 0 bad sectors, adding 2
		bad144: can't read sector, 32367
		zeroing 73717
		bad144: can't read sector, 32366
		zeroing 73718
		write badsect file at 73719 73721 73723 73725 73727
	 bad144 -s /dev/rwd2c
	 fsck /dev/rwd2c
		** /dev/rwd2c
		NAME=/910720_cass15/genix_tree/src/cmd/eqn/glob.c.Z
		REMOVE? y
		UNALLOCATED  I=14420  OWNER=root MODE=0
		SIZE=0 MTIME=Dec 31 16:00 1969
		/910720_cass15/genix_tree/src/cmd/eqn/io.c.Z
		/910720_cass15/genix_tree/src/cmd/eqn/lex.c.Z
		/910720_cass15/genix_tree/src/cmd/eqn/lookup.c.Z
		/910720_cass15/genix_tree/src/cmd/eqn/mark.c.Z
		/910720_cass15/genix_tree/src/cmd/eqn/matrix.c.Z
		/910720_cass15/genix_tree/src/cmd/eqn/move.c.Z
		/910720_cass15/genix_tree/src/cmd/eqn/over.c.Z
		/910720_cass15/genix_tree/src/cmd/eqn/paren.c.Z
		/910720_cass15/genix_tree/src/cmd/eqn/pile.c.Z
		/910720_cass15/genix_tree/src/cmd/eqn/shift.c.Z
		/910720_cass15/genix_tree/src/cmd/eqn/sqrt.c.Z
		/910720_cass15/genix_tree/src/cmd/eqn/text.c.Z
		** Phase 4 - Check Reference Counts
		FREE INODE COUNT WRONG IN SUPERBLK
		FIX? y
		** Phase 5 - Check Cyl groups
		26 BLK(S) MISSING
		BAD CYLINDER GROUPS
	These were not found in lost+found !
920721 BIKER
	/usr/adm/messages
		Mar 20 02:20 wd1a: hard read error, sn 41716 bn 83432
	icheck -bn 83432 /dev/rusr1
		12692
	ncheck -i 12692
		<nothing>
	icheck -b 83432 /dev/rusr1
		/dev/rusr1:
		83432 arg; frag 0 of 4, inode=12692,
			class=logical data block 1066
		files	 941 (r=813,d=128,b=0,c=0,sl=0)
		used   48508 (i=72,ii=1,b=11777,f=1108)
		free   20619 (b=5080,f=299)
		missing    0

	 bad144 -l /dev/rwd1c
		8114 59358 78254 78452 83432 84732 94632 138386 143716
	 bad144 -a -v -c /dev/rwd1c 41716
		Had 9 bad sectors, adding 1
		copying 74628 to 74627 copying 74629 to 74628
		copying 74630 to 74629 copying 74631 to 74630
		copying 74632 to 74631 copying 41716 to 74632
		write badsect file at 74637 74639 74641 74643 74645
	 bad144 -l /dev/rwd1c
		8114 59358 78254 78452 83432 83432 84732 94632 138386 143716
					^	^
920901 BIKER
	Removed both adjacent dip headers while multiuser,
	rebooted,
	keeps doing fsck, then panic: bread: size 0
	syncing disks... ps = 8400020 pc = 1335c ipl=0
	trap type 6 (dvz)

921019 23:00 BIKER
	Suspect overheating caused mega disc damage.
	# bad144 -s /dev/rwd0c /dev/rwd0a /dev/rwd0h /dev/rwd0b \
		/dev/rwd1c /dev/rwd2c /dev/rwd1a /dev/rwd2a
	whole batch of errors occured seperated according to type as follows,
		wd0c: hard read error, sn 13924 bn 27848
		status 59<seekdone,drq,err> error 40<uncorr>
			sn 13924 bn 27848 sn 14571 bn 29142
			sn 24696 bn 49392 sn 24939 bn 49878
			sn 24940 bn 49880 sn 24941 bn 49882
			sn 25263 bn 50526 sn 25264 bn 50528
			sn 25270 bn 50540 sn 25352 bn 50704
			sn 25587 bn 51174 sn 25590 bn 51180
			sn 25591 bn 51182 sn 25911 bn 51822
			sn 25912 bn 51824 sn 25914 bn 51828
			sn 25915 bn 51830 sn 25917 bn 51834
			sn 25919 bn 51838 sn 26235 bn 52470
			sn 26236 bn 52472 sn 26242 bn 52484
			sn 26243 bn 52486 sn 27213 bn 54426
			sn 40819 bn 81638
		soft read errors
			sn 14572 bn 29144
			sn 14573 bn 29146
			sn 22108 bn 44216
			sn 22347 bn 44694
			sn 22349 bn 44698
			sn 24697 bn 49394
			sn 25020 bn 50040
			sn 25251 bn 50502
			sn 25268 bn 50536
			sn 25271 bn 50542
			sn 25350 bn 50700
			sn 25594 bn 51188
			sn 25595 bn 51190
			sn 27215 bn 54430
			sn 27294 bn 54588
			sn 27296 bn 54592
			sn 41139 bn 82278
			sn 64147 bn 128294
			sn 74516 bn 149032
	bad144 -l /dev/rwd0c
		131590
	bad144 -a -v -c /dev/rwd0c 14572 14573 22108 22347  \
		22349 24697 25020 25251 25268 25271 25350 \
		25594 25595 27215 27294 27296 41139 64147 74516
		Had 1 bad sectors, adding 19
		copying 74516 to 82915 copying 82934 to 82916
		copying 64147 to 82917 copying 41139 to 82918
		copying 27296 to 82919 copying 27294 to 82920
		copying 27215 to 82921 copying 25595 to 82922
		copying 25594 to 82923 copying 25350 to 82924
		copying 25271 to 82925 copying 25268 to 82926
		copying 25251 to 82927 copying 25020 to 82928
		wd0c: soft ecc sn 24697 bn 49394
		copying 24697 to 82929 copying 22349 to 82930
		wd0c: soft read error, sn 22347 bn 44694 error 40<uncorr> retries 3
		copying 22347 to 82931 copying 22108 to 82932
		copying 14573 to 82933 copying 14572 to 82934
		write badsect file at 82935 82937 82939 82941 82943
	Only 2 had read errors, so maybe now lid is up disk is cooler,
	so did another bad144 -s /dev/rwd0c to look for errors
	# bad144 -l /dev/rwd0c
		29144 29146 44216 44694 44698 49394 50040 50502 50536 50542
		50700 51188 51190 54430 54588 54592 82278 128294 131590 149032
	# bad144 -s /dev/rwd0c
		soft
		sn 13924 bn 27848 sn 19110 bn 38220 sn 22109 bn 44218
		sn 22112 bn 44224 sn 22348 bn 44696 sn 22352 bn 44704
		sn 22355 bn 44710 sn 24696 bn 49392 sn 24939 bn 49878
		sn 25263 bn 50526 sn 25264 bn 50528 sn 25352 bn 50704
		sn 25668 bn 51336 sn 25912 bn 51824 sn 25914 bn 51828
		sn 26235 bn 52470 sn 26243 bn 52486 sn 27213 bn 54426
		sn 27295 bn 54590
		hard
		sn 14571 bn 29142 sn 24940 bn 49880 sn 24941 bn 49882
		sn 25270 bn 50540 sn 25915 bn 51830 sn 25917 bn 51834
		sn 40819 bn 81638 sn 73790 bn 147580
	# bad144 -a -v -c /dev/rwd0c 13924 19110 22109 22112 22348 22352
		22355 24696 24939 25263 25264 25352 25668 25912 25914 26235
		26243 27213 27295
	i=`icheck -bn	29142 49880 49882 50540 51830 51834 81638 147580 /dev/rwd0c`
	ncheck -i $i /dev/rwd0c

BIKER 921022
	Oct 21 10:50 wd0h: soft write error, sn 19113 bn 10038 error 10<no_id> retries 3
	Oct 21 10:50 wd0h: soft read error, sn 14653 bn 1118 error 40<uncorr> retries 1
	Oct 22 22:30 wd0h: hard read error, sn 25269 bn 22350 status
	Oct 22 22:30 wd0h: hard read error, sn 25587 bn 22986 status
	icheck -bn 22350 /dev/rwd0h
		4647
		4658
		30045
		10038 arg; frag 3 of 4, inode=0, class=free block
	ncheck -i 4647 4658 30045 10038 /dev/rwd0h
		4647	/bin/join
		4658	/bin/ranlib
		30045	/ucb/newaliases
		30045	/ucb/mailq
		30045	/lib/sendmail
	icheck -bn 22986 /dev/rwd0h
		4658
		4658	/bin/ranlib
	# bad144 -a -v -c /dev/rwd0c 25269 25587
921208	BIKER
	# bad144 -s /dev/rwd0h
	14897
	40821
	41146
	64149
	64224
	# bad144 -a -v -c /dev/rwd0c 13927 19113 22105 22106 22107 22353 25185 25913 40823 41144 41147 41223 64467

	wd0c: hard read error,
	sn 40821 bn 81642
	sn 41146 bn 82292
	sn 64149 bn 128298
	sn 64224 bn 128448
	sn 14897 bn 29794
	# bad144 -s /dev/rwd0h
	22354
	40821
	# bad144 -s /dev/rwd0c
	14575
	14897
	14899
	36280
	40821
	41146
	64149
	64794
	bad144 -s /dev/rwd0c
	14897
	40821
921212	BIKER
	removed all adata of root drive, formatted seagate as seaboot,
	writing bad sector table at sector 82935
	hit reset, system locked, on winch, wouldnt respond,
	invereted floppt cable
	system no longe hung on hard disc, but wouldnt boot,
	inverted to normal
	b 2 0 3 0
	disklabel  /dev/rwd0c seaboot
	disklabel  /dev/rwd0a seaboot
	disklabel  /dev/rwd0h seaboot
	newfs /dev/rwd0a seaboot
	newfs /dev/rwd0h seaboot

920223 Biker overheating, Turned om side, with blue room fan impinging on cpu,
	ran ok from 4pm - 10am next day, turned fan off, system
	stopped within 5 mins
	(note this was not a crash, but merely the system froze,
	left led dsplaying Interrupt mask set to 3,
	when fan was turned on , system resumed running within a few seconds,
	(ie no	reboot sequence was executed).
	No chips on disc board were hot except wdc 1014 a bit hot, however
	NSC cpu chip set on main cpu board too hot to touch,
	When I turned fan on to cpu & obscured draught from disc pcb,
	(carefully not jogging any possibly bad contacts)
	this proved it was cpu chip set overheating that was the problem.
	Room ambient temp. was 26 deg. centigrade (79 fahrenheit).
930312~ Biker
	Extended chassis slots under cpu, obscured other slots, didnt help.
	Appended fan under box, didnt help.
930315 Biker:
	Attached heat sinks to cpu chip set, didnt help.
	Converted all cpu chip set sockets to new gold contact sockets
	(only cpu was before, & that was twisted), didnt help.
930316 Biker:
	Jogged console socket,
	STRAY INTERRUPT #f
	psr= 8400020, pc= 7bf, ipl= 1
930409 Skier:
	bad144 -s /dev/rwd2c
		4663
		6978
	bad144 -s /dev/rwd2a
		4663
		6978
	bad144 -s /dev/rwd1c

	/usr/adm/messages:
		wd2c: hard read error, sn 4663 bn 9326 status 59<seekdone,drq,err> error 40<uncorr>
		wd2c: hard read error, sn 6978 bn 13956 status 59<seekdone,drq,err> error 40<uncorr>
	icheck -bn 9326 /dev/rwd2c & 2a give same result:
		                                        2048 2049
		2050 2051 2052 2053 2054 2055 2056 2057 2058 2059
		2060 2061 2062 2063 2064 2065 2066 2067 2068 2069
		2070 2071 2072 2073 2074 2075 2076 2077 2078 2079
	icheck -bn 13956 /dev/rwd2c
		          3072 3073 3074 3075 3076 3077 3078 3079
		3080 3081 3082 3083 3084 3085 3086 3087 3088 3089
		3090 3091 3092 3093 3094 3095 3096 3097 3098 3099
		3100 3101 3102 3103
	ncheck -i 2048 2049  2050 2051 2052 2053 2054 2055 2056 2057 2058 2059  2060 2061 2062 2063 2064 2065 2066 2067 2068 2069  2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 /dev/rwd2a
		/dev/rwd2a:
		ncheck: read error 9320
		ncheck: read error 13952
		ncheck: read error 9320
		ncheck: read error 13952
		2060    /ingres/doc/error
		2049    /local/commands/valid/stuart
		ncheck: read error 9320
		ncheck: read error 13952
		2048    /local/commands/mailname.fail.examples
		2073    /local/basic/pdp11
	ncheck -i 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 /dev/rwd2a
		/dev/rwd2a:
		ncheck: read error 9320
		ncheck: read error 13952
		ncheck: read error 9320
		ncheck: read error 13952
		3073    /adm/bak/usr/lib/v
		ncheck: read error 9320
		ncheck: read error 13952
		3075    /uucp/save
		3072    /local/basic/pyramid
	 bad144 /dev/rwd2c
		64732 64734
	bad144 -a -v -c /dev/rwd2c 4663  6978
		Had 2 bad sectors, adding 2
		copying 73717 to 73715
		copying 73718 to 73716
		bad144: can't read sector, 6978
		zeroing 73717
		bad144: can't read sector, 4663
		zeroing 73718
		write badsect file at 73719
		write badsect file at 73721
		write badsect file at 73723
		write badsect file at 73725
		write badsect file at 73727
	bad144 /dev/rwd2c
		9326 13956 64732 64734
	bad144 /dev/rwd1c
		48078 75154 107106
	bad144 /dev/rwd0c
		7102 8026 56140 60454 60598 60742 84854 117148
Bike:
	Put in a new power supply, then it finally ran stable.
2006.05.02 Skyr:
	bad144 -s wd0a
		4423	wd0c hard read error sn  4423 bn  8846
			wd0c soft read error sn 16160 bn 32320
	/sbin/icheck -bn 8846 wd0a > /jhs/8846
	/sbin/icheck -bn 8847 wd0a > /jhs/8847
	diff -c /jhs/*	# no difference
	cat /jhs/8846
		2144 2145 2146 2147 2148 2149 2150 2151 2152 2153
		2154 2155 2156 2157 2158 2159 2160 2161 2162 2163
		2164 2165 2166 2167 2168 2169 2170 2171 2172 2173
		2174 2175
	/sbin/ncheck -i `cat /jhs/8846` wd0a > /jhs/ncheck
		# more read error, probably names of bad files also within
		# that sector.
		/dev/rwd0a:
		2174    /etc/README.scs
		2168    /etc/fstab.dual.scs
		2169    /etc/gettytab.scs
		2170    /etc/hosts.en.scs
		2173    /etc/hosts.equiv.scs
		2171    /etc/hosts.no_en.scs
		2172    /etc/inetd.conf.scs
		2167    /etc/nu.cf.scs
		2157    /etc/rc.scs
		2175    /etc/rc.local.en.scs
	/sbin/bad144 -a -v wd0a 4423
		# reports non bad blocks, but now adding this one
	/sbin/bad144 -s wd0a
		# reports error still there, so I guess I may have zapped
		# a good block & should have done
		# /sbin/bad144 -a -v wd0c 4423
		Had 0 bad sectors, adding 1
		zeroing 138230
		write badsect file at 138231
		write badsect file at 138233
		write badsect file at 138235
		write badsect file at 138237
		write badsect file at 138239
	Reboot
	/sbin/bad144 -s /dev/rwd0c
		# soft ecc errors:	sn  5080 bn 10160
		#			sn 16160 bn 32320
		Had 1 bad sectors, adding 1
		copying 138230 to 138229
		zeroing 138230
		write badsect file at 138231
		write badsect file at 138233
		write badsect file at 138235
		write badsect file at 138237
		write badsect file at 138239
	Replaced any missing /etc/files from /alt.root