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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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LEARN ABOUT CENTOS

tapeinfo

TAPEINFO(1)						      General Commands Manual						       TAPEINFO(1)

NAME

       tapeinfo - report SCSI tape device info

SYNOPSIS

       tapeinfo -f <scsi-generic-device>

DESCRIPTION

       The  tapeinfo  command  reads  various information from SCSI tape drives that is not generally available via most vendors' tape drivers. It
       issues raw commands directly to the tape drive, using either the  operating  system's  SCSI  generic  device  (	e.g.  /dev/sg0	on  Linux,
       /dev/pass0 on FreeBSD) or the raw SCSI I/O ioctl on a tape device on some operating systems.

       One  good  time	to  use 'tapeinfo' is immediately after a tape i/o operation has failed. On tape drives that support HP's 'tapealert' API,
       'tapeinfo' will report a more exact description of what went wrong.

       Do be aware that 'tapeinfo' is not a substitute for your operating system's own 'mt' or similar tape driver control program. It is intended
       to supplement, not replace, programs like 'mt' that access your operating system's tape driver in order to report or set information.

OPTIONS

       The first argument, given following -f , is the SCSI generic device corresponding to your tape drive.  Consult your operating system's doc-
       umentation for more information (for example, under Linux these are generally start at /dev/sg0 under FreeBSD these start at /dev/pass0).

       Under FreeBSD, 'camcontrol devlist' will tell you what SCSI devices you have, along with which 'pass' device controls  them.  Under  Linux,
       "cat /proc/scsi/scsi" will tell you what SCSI devices you have.

BUGS AND LIMITATIONS

       This program has only been tested on Linux with a limited number of tape drives (HP DDS4, Seagate AIT).

AVAILABILITY

       tapeinfo  is  currently	being maintained by Robert Nelson <robertnelson@users.sourceforge.net> as part of the 'mtx' suite of programs. The
       'mtx' home page is http://mtx.sourceforge.net  and  the	actual	code  is  currently  available	there  and  via  SVN  from  http://source-
       forge.net/projects/mtx.

SEE ALSO

       mt(1),mtx(1),scsitape(1),scsieject(1),loaderinfo(1)

								    TAPEINFO1.0 						       TAPEINFO(1)
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