lkml.org 
[lkml]   [2000]   [Nov]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: IDE tape problem in 2.2.17 on Intel SMP
Date
Thanks for the info.  We're running 2.2.17 from www.kernel.org w/o
any patches.

Jim

>
> Greetings! You're not running the ide patches, are you? We're
> running 2.2.17 with the patches, and have found that we must use the
> ide-scsi interface to get verifiable backups. We still get apparently
> harmless error messages in the logs though.
>
> Here are our modules.conf entries:
>
> pre-install ide-scsi echo ide_scsi:1 > /proc/ide/hdc/settings
> post-install ide-scsi echo using_dma:0 > /proc/ide/hdc/settings
> pre-install ide-tape echo ide_scsi:0 > /proc/ide/hdc/settings
> pre-install st /sbin/modprobe -k ide-scsi
>
> We then use /dev/nst0.
>
> I believe these sysctrl parameters are only available with the ide
> patches. You might be able to replicate the functionality with module
> options if you're not using the patches.
>
> Take care,
>
> jim@rubylane.com writes:
>
> > I wrote on Nov 2nd about IDE tapes no longer working in 2.2.17. The
> > write seems to work fine, but the verify pass causes read errors and
> > a tar abort.
> >
> > I tried changing the priority of the tar process to higher than all
> > others (it was running as a very low priority job and I thought that
> > might be a contributing factor), but the higher priority did not help.
> >
> > I tried restoring the last file from the tape. One day it failed with
> > an "unexpected EOF" error, the next day it restored the file correctly
> > (even though we got the 12 read errors on the verify pass and tar
> > aborted).
> >
> > My conclusion is that the tape write is working. The drive has
> > hardware read after write verification, so I kinda thought this was
> > the case. But IDE tape reads appear to be flakey on an active SMP
> > setup (Intel). This problem started the day we switched from 2.2.16
> > to 2.2.17, without any other software or hardware changes.
> >
> > If I can be of any further help, let me know.
> >
> > Thanks,
> > Jim Wilcoxson
> > Owner, www.rubylane.com
> > -
> > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> > the body of a message to majordomo@vger.kernel.org
> > Please read the FAQ at http://www.tux.org/lkml/
> >
> >
>
> --
> Camm Maguire camm@enhanced.com
> ==========================================================================
> "The earth is but one country, and mankind its citizens." -- Baha'u'llah
>

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 12:45    [W:0.047 / U:0.268 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site