Help with SCSI Tape Drive Issue:
Posted on 2011-03-17
We have 2 external HP LTO2 tape drives that are connected via SCSI connection.
They were chained together and the top one had a terminator on it. They have separate IDs and worked fine until recently.
Now we recently got an HP LTO4 internal tape drive because we needed more space per tape.
This drive is connected using SAS so it's connecting to a different SCSI card altogether.
The LTO4 tape drive seems to work fine. We've been using that for the large data but we've been using the LTO2 tape drives (either one) to backup the Exchange database so it clears the log files, etc.
This backup has been failing lately so I decided to use the HP Library and Tape Tools software to see if there is an issue.
Sure enough, the following is being reported but I'm not sure what it means or how to correct it:
The drive is experiencing polling (1.0 / second polling rate) on initiator ID 7.
This could be due to RSM or it could be due to another host.
Polling can interrupt the normal operation of the drive, and significantly reduce performance.
FYI - The backup software is CA ARCserve Backup r12.5 SP1 on a Windows Server 2003 machine.
I disconnected one of the 2 LTO2 tape drives just to lessen the chances of a conflict.
Any help would be appreciated.