topic tape driv eissue in Operating System - HP-UX

tape driv eissue

Sagar Sirdesai — Thu, 02 Sep 2010 03:44:49 GMT

HI

There is tape Library ( HP SureStore) with 2 Ultrium 1-SCSI tape drives connected to a N Class server running 11.11 OS.
I see that every now the tape backup failes as the OS fails to identify the device associated with ethe drive . The Error is as below
/dev/rmt/2m: No such device or address

We do an ioscan I do see the tape drive
mccartney> ioscan -knfCtape
Class I H/W Path Driver S/W State H/W Type Description
======================================================================
tape 0 0/0/1/0.3.0 stape CLAIMED DEVICE HP C5683A
/dev/rmt/0m /dev/rmt/0mnb /dev/rmt/c0t3d0BESTn /dev/rmt/c0t3d0DDSb
/dev/rmt/0mb /dev/rmt/c0t3d0BEST /dev/rmt/c0t3d0BESTnb /dev/rmt/c0t3d0DDSn
/dev/rmt/0mn /dev/rmt/c0t3d0BESTb /dev/rmt/c0t3d0DDS /dev/rmt/c0t3d0DDSnb
tape 1 0/12/0/0.1.0 stape CLAIMED DEVICE HP Ultrium 1-SCSI
/dev/rmt/1m /dev/rmt/1mn /dev/rmt/c5t1d0BEST /dev/rmt/c5t1d0BESTn
/dev/rmt/1mb /dev/rmt/1mnb /dev/rmt/c5t1d0BESTb /dev/rmt/c5t1d0BESTnb
tape 2 1/10/0/0.2.0 stape CLAIMED DEVICE HP Ultrium 1-SCSI
/dev/rmt/2m /dev/rmt/2mn /dev/rmt/c7t2d0BEST /dev/rmt/c7t2d0BESTn
/dev/rmt/2mb /dev/rmt/2mnb
/dev/rmt/c7t2d0BESTb /dev/rmt/c7t2d0BESTnb

I can also confirm that there is tape in the drive.

Please advice what could be the issue.

Sagar

Re: tape driv eissue

Torsten. — Thu, 02 Sep 2010 04:35:51 GMT

/dev/rmt/2m: No such device or address

This happens if no media is loaded.

You can use "mt", "mc" or just the web panel of the library to check if a media is loaded or even move a media to the drive.

Re: tape driv eissue

Sagar Sirdesai — Thu, 02 Sep 2010 05:10:52 GMT

Hi
The Tape is present in the drive.

Sagar

Re: tape driv eissue

Hakki Aydin Ucar — Thu, 02 Sep 2010 05:23:57 GMT

Hi,

when you issue the command;

# mt -f /dev/rmt/2m status

what do you see ?
if you see Status: [0] there is no tape loaded in the drive OR it does not see the media somehow ,even though it is loaded.

in this case change the media that tested as working in another drive

Re: tape driv eissue

Sagar Sirdesai — Thu, 02 Sep 2010 12:38:53 GMT

A new tape did the trick and the issue is resolved