last year we had problems with SAN media server on RedHat 5. Version of NetBackup was 6.5.4, library SL8500, ACSLS version 7.
The problem happened if there was a failed tape in the library, which caused disconnecting of SAN storage and system crash.
RedHat support says that the failed tape caused hanging of scsi_id process. The multipathd process then interpreted the path as dead and disconnected the path. There was also involved acsd daemon in the problem.
(There are 4 paths to the storage and the tape is only on one of them, though all paths to the storage were disconnected).
We met this problem repeatedly, so we decommisioned this media servers.
Met someone else the same problem?
I would like to ask if this is a known problem and if it is solved with latest versions of NetBackup and ACSLS, since we again need to use SAN media server on some RedHat clients.
We are in the process of upgrage NB and also ACSLS, all on Solaris 10, but I need to know, if it is a good idea to use media servers on RedHat. We are also thinking about a SAN client, which does not need to see tape drives.
Media servers om Linux are perfectly fine - using them at lots of our clients. No issues.
Just double-check that Disk and Tape are zoned to different hba's.
Qlogic hba's seem to be a good choice for tape.