[4179] in linux-scsi channel archive
Re: DDS-2 and DDS-3 with SDT-9000
daemon@ATHENA.MIT.EDU (Christopher B. Smith)
Fri Jun 19 03:53:34 1998
From: "Christopher B. Smith" <cbsmith@envise.com>
To: <cristi@cepes.ro>, "Eric Hall" <ricci@darkart.com>
Cc: <linux-scsi@vger.rutgers.edu>
Date: Fri, 19 Jun 1998 03:48:15 -0400
>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.
Hi there. I've got an SDT-9000 hooked up to a 2940 as well. :-( I can't
say I've had much luck on NT or Linux. I'll try the max commands per LUN
concept, but I was wondering about this mysterious DDS-3 documentation.
I can barely find any documentation on this device in general (or drivers
for
NT for that matter). Can anyone provide me with some helpful pointers?
--Chris
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