dmesg error -> stape

[Kenn Chen]

I found below error message in dmesg and syslog. Please advice ..


1/10/0/0: Unable to access previously accessed device at loop ID 0x2b.
1/10/0/0: Unable to access previously accessed device at loop ID 0x2b.
1/10/0/0: Unable to access previously accessed device at loop ID 0x2b.
1/10/0/0.8.0.43.0.1.0 stape
1/10/0/0.8.0.43.1.2.0 stape

[John Poff]

Hi,

What does your 'ioscan' show for that address? What kind of tape drive do you have connected to this system?

JP

[Kenn Chen]

I have LTO tape drive "Overland" and connected to FC switch which is connected to XP256 (SAN).

ioscan ....show

tape 3 1/10/0/0.8.0.43.0.1.0 stape CLAIMED DEVICE HP Ultrium 1-SCSI
tape 4 1/10/0/0.8.0.43.1.2.0 stape CLAIMED DEVICE HP Ultrium 1-SCSI

[James Murtagh]

Hi Kenn,

Do these messages coincide with the backup windows? In a SAN environment, especially for arbitrated loops which your tape devices are on, the backup software must be able to lock the tape device. If it doesn't, if another system probes the device it it will reset it and cause the tape to rewind causing the backup to fail. Also, if there are LIPs on the loop this can have the same effect.

Please see the st (shared tape) man page for full details.

Regards,

James.

[Eugeny Brychkov]

Ken,
in addition to all replies I propose you to check drive's firmware. Use HP Library and Tape Tools for HP-UX available at http://www.hp.com/cposupport/information_storage/support_doc/lpg50128.html or Support Tools Manager - find .frm file at www.hp.com
Eugeny