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MSL6000 Library - Offline

My customer has a MSL6000 lib on the SAN and 4 servers (Windows). Veritas is the backup software. When ever a scheduled backup starts the tape drives goes in an offline state in veritas and the backups then fail. This happens within less than a minute. Please note that this setup did work but for the pass 3 days the drives go in an offline state in veritas if a backup starts.

I also checked in device manager and the tape drives + media changer also disappears. I then have to power cycle the lib and reinsert the FC cable for device manager to detect the tape drives + media changer. When I start the backup again, still the same problem (drives go offline).

I changed the GBIC on the NSR and Switch port GBIC and also used another switch Port but still the same issue. Removable storage on all windows servers is disabled. I did a firmware update (NSR, Drives and Library) and library is on its latest firmware revision. No errors on the switch port and library event log. I also checked the NRS for errors but could not find any appropriate errors. Zoning is not configured on SAN switches.

Re: MSL6000 Library - Offline

Hi Kehad,

It would be advisable to have zoning in your environment as you have windows servers. The problem could be happening as the server which scans the drives & robots first must be reserving the drives.Veritas uses the SCSI reserve/release features on the host.There is a chapter on SCSI Reserve/Release in Veritas Netbackup Admin guide.You can try scsi releasing the drive before starting a backup.One thing you can try (if this is not a productions setup) is to shutdown 3 hosts, reboot the library & then try the backup from the 4th host. If the backup happens, this is probably a scsi reserve issue.