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Date: Thu, 21 Sep 1995 11:17:15 +0200
From: Lars Köller <lars.koeller@odie.physik2.uni-rostock.de>
Message-Id: <199509210917.LAA27328@odie.physik2.uni-rostock.de>
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To: freebsd-questions@freefall.FreeBSD.org
Subject: Problems with st and HP DAT drive!
Sender: owner-questions@FreeBSD.org
Precedence: bulk

   Hello!

   I use a 2GB HP-DAT drive for backup. 'st stat' reports the following:

Present Mode:   Density = X3B5/88-185A Blocksize variable
---------available modes---------
Mode 0:         Density = 0x00         Blocksize variable
Mode 1:         Density = 0x00         Blocksize variable
Mode 2:         Density = 0x00         Blocksize variable
Mode 3:         Density = 0x00         Blocksize variable

       After backing up  with the  level-0/1  script from GNU-tar I  try to
   verify the tape (/dev/nrst1)

crw-r-----  2 root  operator   14,  17 Sep 21 04:54 /dev/nrst1
crw-r-----  2 root  operator   14,  17 Sep 21 04:54 /dev/nrst1.0
crw-r-----  1 root  operator   14,  21 Sep 15 08:58 /dev/nrst1.1
crw-r-----  1 root  operator   14,  25 Sep 15 08:58 /dev/nrst1.2
crw-r-----  1 root  operator   14,  29 Sep 15 08:58 /dev/nrst1.3
crw-------  1 root  wheel      14, 536870928 Sep 15 08:58 /dev/rst1.ctl

   with tar -tf and get the following error message:

910 : tar tv
tar: read error on /dev/nrst1 : Input/output error

   and on the console

st1: 51200-byte record too big

      the blocksize for tar (-b) is set to 100.  There are no problems with
   the same  procedure on my Wangtec  525MB tape  (/dev/nrst0) but there st
   reports a blocksize of 10240.

      Any suggestions? The manpage for st(4) says a blocksize up to 64kB is
   allowed! 

   Regards

   Lars


--
______________________________________________________________________________
Lars Köller                        E-Mail: 
University of Rostock (Germany)       lars.koeller@odie.physik2.Uni-Rostock.DE
Fachbereich Physik
Universitätsplatz 3		   Phone:  +49 381/498-1665 or 498-1648
18051 Rostock                      Fax:    +49 381/498-1667