Re: Problems with SCSI tape rewind / verify on 2.4.29

[Marcelo Tosatti <marcelo.tosatti@cyclades.com>]

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,