Re: SCSI Tape corruption - update

From: Geert Uytterhoeven (
Date: Fri Jul 27 2001 - 02:49:10 EST

On Fri, 20 Jul 2001, Gérard Roudier wrote:
> On Fri, 20 Jul 2001, Geert Uytterhoeven wrote:
> > The problem is indeed introduced by the changes to the Sym53c8xx in 2.2.18-pre1.
> > I managed to find some intermediate versions in the 2.3.x series, and here are the
> > results:
> > - sym53c8xx-1.3g (from BK linuxppc_2_2): OK
> > - sym53c8xx-1.5e: crash in SCSI interrupt during driver init
> > - sym53c8xx-1.5f: lock up during driver init
> > - sym53c8xx-1.5g: random 32-byte error bursts when writing to tape
> That's an interesting result. But 1.5g - 1.3g diffs are probably very
> large. Patches available from should allow to resurrect
> driver versions 1.4, 1.5, 1.5a, 1.5b, 1.5c, 1.5d.
> You may, for example, apply incremental patches that address kernel 2.2.5
> to a fresh kernel 2.2.5 tree and extract driver files accordingly.


With some small modifications, I made 1.5a to work fine. No error burst. So the
problem is introduced between 1.5a and 1.5g.

Unfortunately my DDS-1 drive seems to have died for real after this test :-(
I don't know yet whether I will replace it with a new tape drive or with a
CD-RW. Which means I may never find out which change caused the problem...

I assume other people suffer from the same error burst problem, but they never
notice until they really want to restore data. Me myself only notived it by
accident, too.



Geert Uytterhoeven -- There's lots of Linux beyond ia32 --

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

- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to More majordomo info at Please read the FAQ at

This archive was generated by hypermail 2b29 : Tue Jul 31 2001 - 21:00:30 EST