[4178] in linux-scsi channel archive
Re: DDS-2 and DDS-3 with SDT-9000
daemon@ATHENA.MIT.EDU (Cristian Nicolae)
Fri Jun 19 03:24:31 1998
Date: Fri, 19 Jun 1998 10:02:22 +0300
From: Cristian Nicolae <cristi@cepes.ro>
Reply-To: cristi@cepes.ro
To: Eric Hall <ricci@darkart.com>
CC: linux-scsi@vger.rutgers.edu
Eric Hall wrote:
>
> At 00:30 +0200 6/19/98, Bernard Legras wrote:
> >I have the following configuration
> >PII 300 x 2, 512Mb, AHA-2940
> >Red Hat 5.0, kernel 2.0.33
> >with a SONY DAT SDT-9000 on the scsi bus
> >
> >The problem I have is that the DAT only accepts to work with
> >standard DDS density. It does not accept DDS-2 (Ox24 code
> >as documented in mt .. densities), even with DDS-3 tape, and
> >I do not know, of course, how to use DDS-3 density which is
> >not documented.
> >
> >Is there any one who can help me to get out of this vexing
> >position?
> >
> [snip]
>
> I have a similar problem, 233MMX, 64M, AHA-1520B, Slackware 3.4 (kernel
> patched to 2.0.34), Sony SDT-7000 (DDS2). I can only get DDS (density code
> 0x13) and I get random hangs when writing to the tape, machine locks
> completely, never in the same point in a backup. I have not yet been able
> to get through a complete backup. I'm about to try using kernel 2.1.106 to
> see if there is a difference, and then maybe another OS. The only
> component I'm not sure about is the cable, everything else has worked fine
> with something else.
> Anybody have a clue?
>
> Thanks much,
>
I had the same problem with AHA2940UW, RH5.0, and SDT7000.
I thought the tape drive was broken so I tested under NT where it
worked fine.
Plugged it back into the Linux box, changed my kernel to 2.1.105,
compiled with
Override driver defaults for commands per LUN: YES
Maximum number of commands per LUN: 36
I add here that the machine was Micron Powerdigm, 2 CPUs PPro 200Mhz,
and all the SCSI devices were connected on a single bus. Disabled wide
negociation for the tape. Eventually it worked. Yesterday other people
told me that he tried the same thing but the hangs still persisted.
Regards,
Cristian
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