[3880] in linux-scsi channel archive
Re: ncr 2.6l & tape
daemon@ATHENA.MIT.EDU (Gerard Roudier)
Sat May 9 15:37:48 1998
Date: Sat, 9 May 1998 20:41:06 +0200 (MET DST)
From: Gerard Roudier <groudier@club-internet.fr>
To: Emanuele Caratti <wiz@iol.it>
cc: linux-scsi@vger.rutgers.edu
In-Reply-To: <19980509154732.53082@deepthought.vw1302.it>
On Sat, 9 May 1998, Emanuele Caratti wrote:
> Hi all!
>
> I've a ncr 810A controller with a tape TDC 3600 rev =08: and a zip plus
> (rev J.66). Linux is 2.0.33 + ncr 2.6l.
>
> I've no problem with writing data to the tape, but when I try to read a
> long tar ( ~ 120MB ), sometimes (and at random point) tar exit with 'Error reading
> /dev/st0' and I find these lines in the syslog:
>
> May 9 15:28:55 kernel: ncr53c810a-0-<4,0>: extraneous data discarded.
> May 9 15:28:55 kernel: ncr53c810a-0-<4,0>: COMMAND FAILED (89 0) @01c5e820.
This should indicate that the device tried to transfer more data than
expected by the driver.
> I've got these messages with several system load:
>
> 1) only tar tv /dev/tape
> 2) tar tv /dev/tape + kernel compile + 2 tar (in parallel) tzf on files on zip
> 3) tar tv /dev/tape + dd if=/dev/sda of=/dev/null bs=512
>
>
> And with the same load sometimes the tape test is successful...
Do you mean that the problem seems not to be related to system load?
Does the problem occur using the following driver versions:
- 2.6k
- 2.6j
You can reverse-patch 2.6l driver using patches 2.6k-to-2.6l and
2.6j-to-2.6k. These patches are avalaible at
ftp.tux.org/pub/roudier/Testing
Do stock 2.4a or 2.5f ncr drivers report this error (or not) in the same
situation?
> The zip drive, instead, works perfectly..
Regards,
Gerard.
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