Messages in this thread | | | Date | Tue, 20 Mar 2001 10:03:37 +0100 (MET) | From | Geert Uytterhoeven <> | Subject | Re: st corruption with 2.4.3-pre4 |
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On Mon, 19 Mar 2001, Jeff Garzik wrote: > Is the corruption reproducible? If so, does the corruption go away if
Yes, it is reproducible. In all my tests, I tarred 16 files of 16 MB each to tape (I used a new one). - test 1: 4 files with failed md5sum (no further investigation on type of corruption) - test 2: 7 files with failed md5sum, 7 blocks of 32 consecutive bytes were corrupted, all starting at an offset of the form 32*x+1. - test 3: 7 files with failed md5sum, 7 blocks of 32 consecutive bytes were corrupted, all starting at an offset of the form 32*x+1.
The files seem to be corrupted during writing only, as reading always gives the exact same (corrupted) data back.
Copying files from the disk on the MESH to a disk on the Sym53c875 (which also has the tape drive) shows no corruption.
> you rip out the scsi_error patch in 2.4.3-preXX?
After reverting that patch, the problem got worse: - test 4: 15 files with failed md5sum, a total of 40 blocks of 32 consecutive bytes were corrupted, all starting at an offset of the form 32*x+1.
So it seems to be related to scsi_error.c.
If you have some suggestions, I'm willing to try them. I'd like to trust whatever Amanda writes to my backup tapes :-)
Gr{oetje,eeting}s,
Geert
-- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
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