Re: Corruption Stats: Suggested Blacklist from the data

Joel D. Elkins (jde@binarts.com)
Thu, 30 Jul 1998 09:22:04 -0500

Linus wrote:
>>And now that I started thinking about it, I also remembered that tar
>>sometimes fails to unpack otherwise good gzipped tarballs (if I repeat the
>>command, everything is (usually) swell). I was blaming tar/gzip for
>>this but now I'm not so sure anymore (especially since I replaced both files
>>and the problem still persists).
>
>But the above does sound very strange indeed. It's not necessarily the disk,
>it could be memory or something else (the fact that it succeeds the second
>time in fact implies that the image on the disk is fine, and that the
>potential corruption happened somewhere else).
>
> Linus

If I remember the original post, he has a SCSI Quantum Fireball on which he was
seeing these strange corruption problems. I can report very similar problems
under 2.0.35, particularly under tight memory. I've since moved that machine
to the 2.1.x tree, and the problems are no more. FWIW, however, the tar/gzip
errors were generally repeatable, and a reboot solved the problem. After a
couple of reboots, however, fsck reported some fairly serious errors. Sounds
like classic memory corruption. Non-overclocked Pentium 166 UP, 430HX chipset.
SCSI host adapter: Adaptec AHA2940U. All problems happened only on the Fireball.

Joel

17[jde@rasta scsi]Z% cat /proc/scsi/scsi 9:07
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
Vendor: SEAGATE Model: ST32430N Rev: 0594
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 01 Lun: 00
Vendor: QUANTUM Model: FIREBALL_TM3200S Rev: 300N
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 02 Lun: 00
Vendor: CONNER Model: CTMS 3200 Rev: 7.15
Type: Sequential-Access ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 05 Lun: 00
Vendor: IOMEGA Model: ZIP 100 Rev: E.08
Type: Direct-Access ANSI SCSI revision: 02

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