Re: Problems with SCSI tape rewind / verify on 2.4.29

Gene Heskett
2005-03-02T17:12:36Z

On Wednesday 02 March 2005 07:03, Marcelo Tosatti wrote:
>On Wed, Mar 02, 2005 at 11:15:42AM -0000, Mark Yeatman wrote:
>> Hi
>>
>> Never had to log a bug before, hope this is correctly done.
>>
>> Thanks
>>
>> Mark
>>
>> Detail....
>>
>> [1.] One line summary of the problem:
>> SCSI tape drive is refusing to rewind after backup to allow verify
>> and causing illegal seek error
>>
>> [2.] Full description of the problem/report:
>> On backup the tape drive is reporting the following error and
>> failing it's backups.
>>
>> tar: /dev/st0: Warning: Cannot seek: Illegal seek
>>
>> I have traced this back to failing at an upgrade of the kernel to
>> 2.4.29 on Feb 8th. The backups have not worked since. Replacement
>> Drives have been tried and cables to no avail. I noticed in the
>> the changelog that a patch by Solar Designer to the Scsi tape
>> return code had been made.
>
>v2.6 also contains the same problem BTW.
>
>Try this:
>
>--- a/drivers/scsi/st.c.orig 2005-03-02 09:02:13.637158144 -0300
>+++ b/drivers/scsi/st.c 2005-03-02 09:02:20.208159200 -0300
>@@ -3778,7 +3778,6 @@
> read: st_read,
> write: st_write,
> ioctl: st_ioctl,
>- llseek: no_llseek,
> open: st_open,
> flush: st_flush,
> release: st_release,
>-

Interesting Marcelo. How long has this been true in 2.6?

I thought I had an amanda problem, and eventually went to virtual
tapes on disk, largely because of this. However, I have to say it is
working better than tapes ever did here. Unforch, that 200GB disk is
certainly a single point of failure I don't relish thinking about...

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--
Cheers, Gene
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