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Full Discussion: Tape drive install
Top Forums UNIX for Dummies Questions & Answers Tape drive install Post 15743 by killerserv on Tuesday 19th of February 2002 03:38:25 AM
Old 02-19-2002
Ok,
I Experienced this problems before. You may try with this steps.
If you can tar cvf /dev/rStp0 .(or rStp1 if this was the second drive), but cannot do "tape" commands, then run mkdev tape again and select the default tape drive. Or for a quicker test:

rm /dev/xct0
mknod /dev/xct0 c 46 128 (assuming rStp0)

and then try "tape status" etc.

For tapes, the minor number for ioctl is 128. The ioctl devices are /dev/xct0, /dev/xStp0, etc. If you have created a SCSI tape, but didn't set it as default, then the /dev/xct0 is

crw-r--r-- 1 root sys 10,128 Sep 21 10:35 /dev/xct0

which has the right minor number, but the major (10) is for a cartridge tape, not SCSI.

You could fix this as suggested above, or by editing /etc/default/tape and changing the

device = /dev/xct0
to
device = /dev/xStp0

Give a try first, let me know if this helps.
Works for me.
 

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dds-dd(1)						      General Commands Manual							 dds-dd(1)

NAME
dds-dd - tool to read a dds device. SYNOPSIS
dds-dd [ -f device ] DESCRIPTION
dds-dd reads a dds tape devices (DAT). Every block is read and written to stdout. A tape with unknown block size or blocks of different size can be read. The default device is /dev/rmt0, which may be overridden with the environment variable TAPE, which in turn may be overridden with the -f device option. The device must be a character special file. OPTIONS
-f device Device of the tape archive (default is /dev/rmt0). Must be a character special file connected to a dds tape device. -V,--version Print the version number of mt-dds to stderr and exit immediately. --help print some screens of online help with examples through a pager and exit immediately. EXAMPLES
Example: Read the tape and make a listing: dds-dd | tar ft - Example: Read the tape and make a listing: dds-dd | cpio -it ENVIRONMENT
The environment variable TAPE overrides the default tape device /dev/rmt0. SEE ALSO dds2tar(1), dds2index(1), mt(1), tar(1) HISTORY
This program was created to use it in conjunction with dds2tar. AUTHOR
J"org Weule (weule@cs.uni-duesseldorf.de), Phone +49 211 751409. This software is available at ftp.uni-duesseldorf.de:/pub/unix/apollo 2.4 dds-dd(1)
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