topic Re: Tape Question in Operating System - HP-UX

Tape Question

Robert Fisher_1 — Tue, 08 Aug 2006 14:48:59 GMT

Hi guys,

I have a very simple question. How can I tell if a tape is in the drive?

Thanks,
Bob

Re: Tape Question

A. Clay Stephenson — Tue, 08 Aug 2006 14:53:09 GMT

mt -f /dev/rmt/0m rew
STAT=${?}
if [[ ${STAT} -eq 0 ]]
then
echo "Tape is mounted"
else
echo "No tape; status ${STAT}"
fi

Re: Tape Question

James R. Ferguson — Tue, 08 Aug 2006 14:54:37 GMT

Hi Robert:

# mt -t /dev/rmt/0mnb rew

...for instance...

...will fail if no tape is present.

Regards!

...JRF...

Re: Tape Question

A. Clay Stephenson — Tue, 08 Aug 2006 14:57:21 GMT

Oh, and I should add if you want to avoid any pesky error messages coming to your terminal then redirect stderr:

mt -f /dev/rmt/0m rew 2>/dev/null

Re: Tape Question

Steven E. Protter — Tue, 08 Aug 2006 15:10:12 GMT

Shalom Bob,

Of course any mt command is fine.

Why not try this:

tar cvf /dev/rmt/0m /etc/issue

Of course this can be messed up by the write tab on the table.

SEP

Re: Tape Question

OldSchool — Wed, 09 Aug 2006 12:49:42 GMT

just stay away from "offl" in the mt command.

rewinds / ejects tape (on DLT unloads tape and set "Operate handle" light) which would leave the tape drive unusable until tape is removed and reinserted.

Re: Tape Question

Pupil_1 — Wed, 09 Aug 2006 13:25:25 GMT

mt -f /dev/rmt/xmn status
will give you the availability of the tape !!

# mt -f /dev/rmt/0mn status
Drive: HP C1537A
Format:
Status: [0]
File: 2
Block: -1
#

Means that the tape is missing !!

#mt -f /dev/rmt/0mn status
Drive: HP C1537A
Format: DDS-3 format
Status: [41112500] BOT online compression immediate-report-mode
File: 0
Block: 0
#

Means that the drive has a DDS3 tape inside !!

Re: Tape Question

V.Manoharan — Wed, 09 Aug 2006 19:05:23 GMT

Hi Robert,
simple mt(magnetic tape control) command will do most of the tape releated operation like tape movement,eject,rewind etc. for more info see the man page.

mt -f /dev/rmt/0mn status -->will show whether tape is present or not.

thanks and regards
V.Manoharan