From mboxrd@z Thu Jan  1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 14563] SCSI tape driver: Spurious EIO and kernel BUG
Date: Mon, 16 Nov 2009 19:19:35 GMT
Message-ID: <200911161919.nAGJJZ94028105@demeter.kernel.org>
References: <bug-14563-11613@http.bugzilla.kernel.org/>
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http://bugzilla.kernel.org/show_bug.cgi?id=3D14563





--- Comment #6 from Kai M=C3=A4kisara <kai.makisara@kolumbus.fi>  2009-=
11-16 19:19:33 ---
On Mon, 9 Nov 2009, bugzilla-daemon@bugzilla.kernel.org wrote:

> http://bugzilla.kernel.org/show_bug.cgi?id=3D14563
,,,
> Overview:
>=20
> Performing tape backups using amanda 2.6.0-p2 [using 512kB block size=
] leads to
> spurious 'EIO' errors when writing to the tape; most of the time a ke=
rnel BUG
> is hit shortly thereafter.
>=20

Can you try this with debugging enabled in st? (Edit st.c to
'#define DEBUG 1' and recompile the module.) This might give more=20
information about the source of the EIO and the code path it uses.

=2E..
> Amanda should correctly write to tape during backup as it does using =
kernels <=3D
> 2.6.27.10.
>=20
>=20
> Affected versions:
>=20
> The oldest kernel I tried which DOES exhibit the problem is 2.6.29.4;=
 other
> kernels exhibiting this problem are 2.6.30.3 and 2.6.31.5.
>=20

There were major changes to the code performing the SCSI commands at=20
2.6.29. The changes were mostly done by Fujita Tomonori and I added him=
 to=20
the cc list.

Kai

--=20
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