Re: Slow tape read-write after upgrade
On Tue, 29 May 2012 16:33:55 +0400, Yury O. Tabolin wrote:
> I had a server with Debian Lenny x64, with the old kernel 2.6.18 (it is
> still from Etch). I upgraded all to Squeeze, with the native kernel
> 2.6.32. Everything worked well except the tape library HP StorageWorks
> MSL 4048 Ultrium 960, connected to it via SCSI Megaraid 320-2x. It has
> become very slow. If I had read/write speeds were about 40MB/s before
> upgrade, now they are reduced to 1.5 MB/s. When the module "st" is
> loaded i have a error:
>
> [1186434.533759] st: Version 20081215, fixed bufsize 32768, s/g segs 256
> [1186434.535595] st 2:1:4:0: Attached scsi tape st0
> [1186434.535619] st 2:1:4:0: st0: try direct i/o: yes (alignment 4 B)
> [1186435.276372] scsi_id[774]: segfault at 0 ip (null) sp 00000000ffdff520 error 14
> [1186435.953466] scsi_id[777]: segfault at 0 ip (null) sp 00000000ffa00a20 error 14
(...)
"st" kernel module seems to be segfaulting. I would try to reproduce the
error from a clean Squeeze installation to discard a problem coming from
the upgrade and if it's still present, I'd report it in BTS.
Greetings,
--
Camaleón
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