[7293] in linux-scsi channel archive
problems with scsi tape on Adaptec/Tekram host (solved)
daemon@ATHENA.MIT.EDU (Roland Boden)
Thu Sep 30 10:04:17 1999
From: "Roland Boden" <rb@activelink.de>
To: Kurt Garloff <garloff@suse.de>
cc: =?iso-8859-1?Q?G=E9rard_Roudier?= <groudier@club-internet.fr>,
Linux SCSI list <linux-scsi@vger.rutgers.edu>
Message-ID: <412567FC.004ED64A.00@al-www-mun-00.activelink.de>
Date: Thu, 30 Sep 1999 15:55:00 +0100
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Dear Kurt Garloff,
I think you got the right idea!
I enabled "allow disconnect" for the tape device in the Tekram controller and now it seems to
work. I could read some tapes correctly.
I now also understand why I couldn't do anything with the disk while trying to do something
with the tape, even if the disk and the tape are connected to different scsi hosts (you wrote
the scsi bus is being monopolized).
The idea of disabling "allow disconnect" really comes from the "SCSI-Checkliste" available in
the SuSE support database (http://sdb.suse.de/sdb/de/html/kfr_15.html). There it sounds that
"allow disconnect" is the save cofiguration for Adaptec host adapters. I then configured the
Tekram adapter the same way.
I didn't tell you about the "allow disconnect" setting before (yust sead I used the scsi
checklist from SuSE). For me it never could be the reason for the tape behaviour because I
believed what the "scsi experts" wrote.
So I am very happy now, thanks for your great help!
By the way: some tapes seem to have errors when reading them (no problem when writing). I just
have one brand new tape but can read only the first n blocks. the command "mt -f /dev/nst0 eom"
also ends in an error. Might this be a problem with the "allow disconnect" setting? or is this
a DAT related problem/general problem? I heard from other DAT users (using Windows NT) of the
same problem!
Regards,
Roland Boden
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