topic Re: tape problem in Operating System - HP-UX

tape problem

matteo_4 — Tue, 27 Jan 2004 05:40:28 GMT

Hi all,
i have a dat dds2 model external on my hp b180l it was ok in the past before today.

I try to backup a file into it:
tar -cvf /dev/rmt/0m myjob

but
reply to me
tar cannot open device /dev/rmt/0m

also mt -t /dev/rmt/0mnb rew
reply to me device busy

into the dat there is a new dds2 tape.

and also ioscan show me the tape CLAIMED.

Please help me.

Re: tape problem

David Burgess — Tue, 27 Jan 2004 05:52:30 GMT

Just a thought. Have you cleaned the heads recently? Is the tape write protected? Will another tape work?

Regards,

Dave.

Re: tape problem

G. Vrijhoeven — Tue, 27 Jan 2004 06:05:26 GMT

Hi,

I addition to david, could it be that the device is used by an other process?
check with ( man ) fuser.

fuser -cu /dev/rmt/0m

Gideon

Re: tape problem

Pete Randall — Tue, 27 Jan 2004 06:10:18 GMT

It definitely sounds like another process already owns the drive. Try using fuser to see if you can locate the process. Failing that, lsof is the perfect tool for this sort of situation. Here's a link for the 64 bit 11i version:

http://the-other.wiretapped.net/security/host-security/lsof/binaries/hpux/B.11.11/

and the 11.0 64 bit version:

http://the-other.wiretapped.net/security/host-security/lsof/binaries/hpux/B.11.00/vxfs/64/9000_785/

Pete

Re: tape problem

Elmar P. Kolkman — Tue, 27 Jan 2004 06:11:56 GMT

Sorry to disagree, but fuser -c works on mountpoints only, not on tape devices.
fuser -u /dev/rmt/0mnb
should do the trick.

Re: tape problem

Mark Grant — Tue, 27 Jan 2004 06:17:36 GMT

You could always try "mt -f /dev/rmt/0mn rel" or "st -f /dev/rmt/0mn -r" to attempt to release the device. It sounds like a SCSI lock.

Re: tape problem

matteo_4 — Tue, 27 Jan 2004 06:47:44 GMT

hi all
thank you very much there was a process that lock my tape.