Backup Exec 2010 R3 with LTO4 tape drive attached via Adaptec 29320LPE card.
I'm getting horrible performance even from the host to the tape device, averaging around 300MB/min.
I've tried things like drivers, scsi cable, HP LTT tools, etc.
The only thing I've found that might help so far is that the HP LTT Tools state:
The drive is experiencing polling (1.0 / sec. polling rate) on initiator ID 7.
Polling can interrupt the normal operation of the drive, and significantly reduce performance.
I looked and noticed that both the adaptec card and the internal "megasas" card that controls the external SAS connector are both at ID 7.
So the question is...could this be the issue as to why the tape is so slow? Ways to fix it? Can I change the adaptec SCSI id? Should I?
Any other thoughts as to why the Tape is so slow? Even the HP LTT tools only get around 14MB/s so it isn't Backup Exec causing it...it seems hardware related to me.