disk problems -- suggestions?

Wed Oct 11 16:50:16 AEST 1989

The disk on my 7300, royko, recently started acting up again,
with jobs getting bumped off at random times and lots of disk
errors being logged to /usr/adm/unix.log.  At least it looks
like disk problems, and since one block (in the swap partition)
went quite bad last spring I'm not too surprised.

On the other hand, while there are some rather obvious clusters
of errors (cylinder 44 and perhaps also 43, sector 7, head 1),
there are also a lot of randomly distributed errors.  Could it
be some other problem instead or in addition to a bad disk?  I
have a WD2010 scheduled to be installed in royko, is it likely
that the new controller will ease the problem?

The disk is a Seagate ST251-1 which was installed about a year
and a half ago and put into regular service last fall; other-
wise the machine is a stock 7300 with a combo board populated
to 1.5 MB running various kernels, most recently 3.51dG1.  (No,
that's not a typo.)

Following are two excerpts from unix.log sorted and uniq -c'ed
to highlight the offending blocks, with the full log after that.
Any help interpreting this data as well as suggestions (other
than get a new disk -- ditka gets a Maxtor before royko gets a
new disk) would be most appreciated.

   1 cy=111. sc=0. hd=5.
   1 cy=14745623. sc=0. hd=4.
   2 cy=14745643. sc=7. hd=1.
   2 cy=14745644. sc=7. hd=1.
   1 cy=14745707. sc=0. hd=0.
   1 cy=14745709. sc=8. hd=5.
   1 cy=14745710. sc=0. hd=5.
   1 cy=14745711. sc=4. hd=5.
   1 cy=14745716. sc=0. hd=5.
   1 cy=14745727. sc=6. hd=2.
   1 cy=14746148. sc=2. hd=5.
   4 cy=14746171. sc=2. hd=0.
   1 cy=325. sc=6. hd=4.
   1 cy=425. sc=4. hd=3.
   2 cy=43. sc=7. hd=1.
   6 cy=44. sc=7. hd=1.
   2 cy=557. sc=4. hd=5.

   1 CL:17 CH:0 SN:0 SC:8 SDH:24
   1 CL:24 CH:2 SN:2 SC:2 SDH:25
   4 CL:2B CH:0 SN:7 SC:1 SDH:21
   8 CL:2C CH:0 SN:7 SC:1 SDH:21
   2 CL:2D CH:2 SN:4 SC:2 SDH:25
   4 CL:3B CH:2 SN:2 SC:2 SDH:20
   1 CL:45 CH:1 SN:6 SC:4 SDH:24
   1 CL:6B CH:0 SN:0 SC:2 SDH:20
   1 CL:6D CH:0 SN:8 SC:2 SDH:25
   1 CL:6E CH:0 SN:0 SC:2 SDH:25
   1 CL:6F CH:0 SN:0 SC:2 SDH:25
   1 CL:6F CH:0 SN:4 SC:2 SDH:25
   1 CL:74 CH:0 SN:0 SC:4 SDH:25
   1 CL:A9 CH:1 SN:4 SC:2 SDH:23

wd?010 ST=/Sekg/Err/ EF=/Id?/ cy=14745727. sc=6. hd=2. dr#=0. MCR2:0x0 Thu Sep 28 16:01:13 1989

drv:0 part:2 blk:1067 rpts:1 Thu Sep 28 16:01:13 1989

HDERR ST:51 EF:10 CL:6D CH:0 SN:8 SC:2 SDH:25 DMACNT:FFFF DCRREG:9D MCRREG:CB00 Fri Sep 29 01:01:03 1989

wd?010 ST=/Sekg/Err/ EF=/Id?/ cy=14745709. sc=8. hd=5. dr#=0. MCR2:0x0 Fri Sep 29 01:01:04 1989

drv:0 part:2 blk:228 rpts:1 Fri Sep 29 01:01:04 1989

HDERR ST:51 EF:10 CL:3B CH:2 SN:2 SC:2 SDH:20 DMACNT:FFFF DCRREG:98 MCRREG:CD00 Fri Sep 29 06:42:59 1989

wd?010 ST=/Sekg/Err/ EF=/Id?/ cy=14746171. sc=2. hd=0. dr#=0. MCR2:0x0 Fri Sep 29 06:43:01 1989

drv:0 part:2 blk:22361 rpts:1 Fri Sep 29 06:43:02 1989

HDERR ST:51 EF:10 CL:74 CH:0 SN:0 SC:4 SDH:25 DMACNT:FFFF DCRREG:9D MCRREG:8100 Fri Sep 29 13:02:02 1989

wd?010 ST=/Sekg/Err/ EF=/Id?/ cy=14745716. sc=0. hd=5. dr#=0. MCR2:0x0 Fri Sep 29 13:02:02 1989

drv:0 part:2 blk:560 rpts:1 Fri Sep 29 13:02:02 1989

HDERR ST:51 EF:10 CL:6F CH:0 SN:4 SC:2 SDH:25 DMACNT:FFFF DCRREG:9D MCRREG:CB00 Sat Sep 30 05:49:01 1989

wd?010 ST=/Sekg/Err/ EF=/Id?/ cy=14745711. sc=4. hd=5. dr#=0. MCR2:0x0 Sat Sep 30 05:49:01 1989

drv:0 part:2 blk:322 rpts:1 Sat Sep 30 05:49:01 1989

HDERR ST:51 EF:10 CL:24 CH:2 SN:2 SC:2 SDH:25 DMACNT:FFFF DCRREG:9D MCRREG:8500 Sat Sep 30 07:14:02 1989

wd?010 ST=/Sekg/Err/ EF=/Id?/ cy=14746148. sc=2. hd=5. dr#=0. MCR2:0x0 Sat Sep 30 07:14:03 1989

drv:0 part:2 blk:21297 rpts:1 Sat Sep 30 07:14:04 1989

HDERR ST:51 EF:10 CL:6E CH:0 SN:0 SC:2 SDH:25 DMACNT:FFFF DCRREG:9D MCRREG:C500 Sun Oct  1 06:45:05 1989

wd?010 ST=/Sekg/Err/ EF=/Id?/ cy=14745710. sc=0. hd=5. dr#=0. MCR2:0x0 Sun Oct  1 06:45:06 1989

drv:0 part:2 blk:272 rpts:1 Sun Oct  1 06:45:08 1989

HDERR ST:51 EF:10 CL:17 CH:0 SN:0 SC:8 SDH:24 DMACNT:FFFF DCRREG:9C MCRREG:8900 Mon Oct  2 07:08:27 1989

wd?010 ST=/Sekg/Err/ EF=/Id?/ cy=14745623. sc=0. hd=4. dr#=0. MCR2:0x0 Mon Oct  2 07:08:29 1989

drv:0 part:1 blk:1088 rpts:1 Mon Oct  2 07:08:29 1989

HDERR ST:51 EF:10 CL:3B CH:2 SN:2 SC:2 SDH:20 DMACNT:FFFF DCRREG:98 MCRREG:8300 Tue Oct  3 06:39:41 1989

wd?010 ST=/Sekg/Err/ EF=/Id?/ cy=14746171. sc=2. hd=0. dr#=0. MCR2:0x0 Tue Oct  3 06:39:45 1989

drv:0 part:2 blk:22361 rpts:1 Tue Oct  3 06:39:46 1989

HDERR ST:51 EF:10 CL:3B CH:2 SN:2 SC:2 SDH:20 DMACNT:FFFF DCRREG:98 MCRREG:C500 Tue Oct  3 06:39:59 1989

wd?010 ST=/Sekg/Err/ EF=/Id?/ cy=14746171. sc=2. hd=0. dr#=0. MCR2:0x0 Tue Oct  3 06:40:05 1989

HDERR ST:51 EF:10 CL:3B CH:2 SN:2 SC:2 SDH:20 DMACNT:FFFF DCRREG:98 MCRREG:C500 Tue Oct  3 06:40:06 1989

wd?010 ST=/Sekg/Err/ EF=/Id?/ cy=14746171. sc=2. hd=0. dr#=0. MCR2:0x0 Tue Oct  3 06:40:07 1989

HDERR ST:51 EF:40 CL:2C CH:0 SN:7 SC:1 SDH:21 DMACNT:FFFF DCRREG:99 MCRREG:8900 Tue Oct  3 06:58:26 1989

wd?010 ST=/Sekg/Err/ EF=/CRC/ cy=14745644. sc=7. hd=1. dr#=0. MCR2:0x0 Tue Oct  3 06:58:28 1989

HDERR ST:51 EF:40 CL:2C CH:0 SN:7 SC:1 SDH:21 DMACNT:FFFF DCRREG:99 MCRREG:8B00 Tue Oct  3 06:58:29 1989

wd?010 ST=/Sekg/Err/ EF=/CRC/ cy=14745644. sc=7. hd=1. dr#=0. MCR2:0x0 Tue Oct  3 06:58:30 1989

HDERR ST:51 EF:10 CL:6B CH:0 SN:0 SC:2 SDH:20 DMACNT:FFFF DCRREG:98 MCRREG:8B00 Wed Oct  4 05:30:27 1989

wd?010 ST=/Sekg/Err/ EF=/Id?/ cy=14745707. sc=0. hd=0. dr#=0. MCR2:0x0 Wed Oct  4 05:30:29 1989

drv:0 part:2 blk:88 rpts:1 Wed Oct  4 05:30:30 1989

Spurious interrupt - level 2 Thu Oct  5 22:21:15 1989

Spurious interrupt - level 2 Thu Oct  5 22:26:12 1989

Spurious interrupt - level 2 Thu Oct  5 22:29:30 1989

Spurious interrupt - level 2 Thu Oct  5 22:30:18 1989

HDERR ST:51 EF:40 CL:2B CH:0 SN:7 SC:1 SDH:21 DMACNT:FFFF DCRREG:99 MCRREG:8B00 Thu Oct  5 23:49:48 1989

wd?010 ST=/Sekg/Err/ EF=/CRC/ cy=14745643. sc=7. hd=1. dr#=0. MCR2:0x0 Thu Oct  5 23:49:49 1989

HDERR ST:51 EF:40 CL:2B CH:0 SN:7 SC:1 SDH:21 DMACNT:FFFF DCRREG:99 MCRREG:8D00 Thu Oct  5 23:49:50 1989

wd?010 ST=/Sekg/Err/ EF=/CRC/ cy=14745643. sc=7. hd=1. dr#=0. MCR2:0x0 Thu Oct  5 23:49:50 1989

HDERR ST:51 EF:10 CL:2D CH:2 SN:4 SC:2 SDH:25 DMACNT:FFFF DCRREG:9D MCRREG:8700 Fri Oct  6 06:52:58 1989

WD1010 ST=/Sekg/Err/ EF=/Id?/ cy=557. sc=4. hd=5. dr#=0. MCR2:0x0 Fri Oct  6 06:53:00 1989

drv:0 part:2 blk:21730 rpts:1 Fri Oct  6 06:53:01 1989

HDERR ST:51 EF:40 CL:2B CH:0 SN:7 SC:1 SDH:21 DMACNT:FFFF DCRREG:99 MCRREG:8900 Fri Oct  6 07:02:21 1989

WD1010 ST=/Sekg/Err/ EF=/CRC/ cy=43. sc=7. hd=1. dr#=0. MCR2:0x0 Fri Oct  6 07:02:22 1989

HDERR ST:51 EF:40 CL:2B CH:0 SN:7 SC:1 SDH:21 DMACNT:FFFF DCRREG:99 MCRREG:8F00 Fri Oct  6 07:02:23 1989

WD1010 ST=/Sekg/Err/ EF=/CRC/ cy=43. sc=7. hd=1. dr#=0. MCR2:0x0 Fri Oct  6 07:02:23 1989

HDERR ST:51 EF:10 CL:2D CH:2 SN:4 SC:2 SDH:25 DMACNT:FFFF DCRREG:9D MCRREG:8F00 Fri Oct  6 07:09:55 1989

WD1010 ST=/Sekg/Err/ EF=/Id?/ cy=557. sc=4. hd=5. dr#=0. MCR2:0x0 Fri Oct  6 07:09:56 1989

drv:0 part:2 blk:21730 rpts:1 Fri Oct  6 07:09:57 1989

HDERR ST:51 EF:40 CL:2C CH:0 SN:7 SC:1 SDH:21 DMACNT:FFFF DCRREG:99 MCRREG:8100 Fri Oct  6 07:23:51 1989

WD1010 ST=/Sekg/Err/ EF=/CRC/ cy=44. sc=7. hd=1. dr#=0. MCR2:0x0 Fri Oct  6 07:23:52 1989

HDERR ST:51 EF:40 CL:2C CH:0 SN:7 SC:1 SDH:21 DMACNT:FFFF DCRREG:99 MCRREG:8300 Fri Oct  6 07:23:53 1989

WD1010 ST=/Sekg/Err/ EF=/CRC/ cy=44. sc=7. hd=1. dr#=0. MCR2:0x0 Fri Oct  6 07:23:54 1989

HDERR ST:51 EF:40 CL:2C CH:0 SN:7 SC:1 SDH:21 DMACNT:FFFF DCRREG:99 MCRREG:8500 Fri Oct  6 07:24:02 1989

WD1010 ST=/Sekg/Err/ EF=/CRC/ cy=44. sc=7. hd=1. dr#=0. MCR2:0x0 Fri Oct  6 07:24:04 1989

HDERR ST:51 EF:40 CL:2C CH:0 SN:7 SC:1 SDH:21 DMACNT:FFFF DCRREG:99 MCRREG:8500 Fri Oct  6 07:24:05 1989

WD1010 ST=/Sekg/Err/ EF=/CRC/ cy=44. sc=7. hd=1. dr#=0. MCR2:0x0 Fri Oct  6 07:24:08 1989

HDERR ST:51 EF:10 CL:A9 CH:1 SN:4 SC:2 SDH:23 DMACNT:FFFF DCRREG:9B MCRREG:8500 Sat Oct  7 07:04:22 1989

WD1010 ST=/Sekg/Err/ EF=/Id?/ cy=425. sc=4. hd=3. dr#=0. MCR2:0x0 Sat Oct  7 07:04:23 1989

drv:0 part:2 blk:15378 rpts:1 Sat Oct  7 07:04:23 1989

HDERR ST:51 EF:40 CL:2C CH:0 SN:7 SC:1 SDH:21 DMACNT:FFFF DCRREG:99 MCRREG:8300 Sat Oct  7 07:36:51 1989

WD1010 ST=/Sekg/Err/ EF=/CRC/ cy=44. sc=7. hd=1. dr#=0. MCR2:0x0 Sat Oct  7 07:36:51 1989

HDERR ST:51 EF:40 CL:2C CH:0 SN:7 SC:1 SDH:21 DMACNT:FFFF DCRREG:99 MCRREG:8100 Sat Oct  7 07:36:52 1989

WD1010 ST=/Sekg/Err/ EF=/CRC/ cy=44. sc=7. hd=1. dr#=0. MCR2:0x0 Sat Oct  7 07:36:52 1989

HDERR ST:51 EF:10 CL:6F CH:0 SN:0 SC:2 SDH:25 DMACNT:FFFF DCRREG:9D MCRREG:CD00 Sat Oct  7 10:38:43 1989

WD1010 ST=/Sekg/Err/ EF=/Id?/ cy=111. sc=0. hd=5. dr#=0. MCR2:0x0 Sat Oct  7 10:38:45 1989

drv:0 part:2 blk:320 rpts:1 Sat Oct  7 10:38:46 1989

HDERR ST:51 EF:10 CL:45 CH:1 SN:6 SC:4 SDH:24 DMACNT:FFFF DCRREG:9C MCRREG:8300 Mon Oct  9 06:45:46 1989

WD1010 ST=/Sekg/Err/ EF=/Id?/ cy=325. sc=6. hd=4. dr#=0. MCR2:0x0 Mon Oct  9 06:45:47 1989

drv:0 part:2 blk:10587 rpts:1 Mon Oct  9 06:45:47 1989

-- 
Karl Swartz		|UUCP		apple!zygot!ditka!kls
1-408/223-1308 (home)	|Internet	kls at ebnextk.slac.stanford.edu
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"I never let my schooling get in the way of my education."  (Twain)