topic Re: Rewinding of the tape in Operating System - Linux

Rewinding of the tape

Sunit Shukla — Thu, 13 Feb 2003 17:01:37 GMT

Hi Guys

Omniback II is configured with tape drive as backup medium on HP-UX 11.0 system. I do formatting of the tape through (/dev/rmt/0m) Omniback II. Formatting is OK but does not rewind. After this I start backup it give I/O error that it can write on the tape. Can anyone suggest me how I can do rewind of the tape or there is any other error. I would appreciate the help.

Sunit

Re: Rewinding of the tape

Francisco J. Soler — Thu, 13 Feb 2003 17:18:50 GMT

Hi Sunit,
you could try with

mt -t device rew

but you should'n use a device with no-rewind, in your /dev/rmt/ directory there are some devices ending in "n" thay means no rewind.

Frank.

Re: Rewinding of the tape

Paul Middleton — Tue, 25 Feb 2003 17:28:40 GMT

Sunit,
FYI,
.
the mt instructions has changed in 11.0.
In 10.x, the command looked like this -
mt -t /dev/rmt/0m rew
.
But, for some reason, in 11.x it's like this,
mt -f /dev/rmt/0m rew
.
No idea why. I found out when working on a V-Class and the command from 10.x didn't work.
.
Hope this helps.
.
Paul Middleton

Re: Rewinding of the tape

Mangus Määttä — Wed, 26 Feb 2003 04:54:04 GMT

That probably changed due to the fact that it is mt -f in linux (and probably others too) to make it less confusing for people who have used other systems and to allow faster porting of scripts which use mt.

Re: Rewinding of the tape

Volker Borowski — Tue, 04 Mar 2003 22:27:32 GMT

Hello,

this appears like an Omniback problem to me.
At least in Version 3.5 the tapes to be used had to be Berkley style, so you had to take /dev/rmt/0mb.

What version of Omniback do you use ? On which platform/release do you run the Cellserver and on which platform/release is your media agent ?

Best regards
Volker