I'm just consolidating 7 x BackupExec 9.1 into one BackupExec 11D server, which runs on Window's 2003. The server is attached via a fibre switch to a HP StorageWorks MSL 4048 with 2 x LTO4 drives. One of the drives is faulty and we're awaiting a replacement drive.
I have been able to play around with the other tape drive in order to gage throughput rates that will hopefully tell me if 2TB can be backed up overnight. The working tape drive is currently running at 160mb per min, yet when I used the latest version of the L&TT to run a drive performance test and the working drive is running at 98MB a second. Having performed a health check on the working drive, the following message appears under the drive analysis section.
"There are indications that the drive is experiencing a high polling rate on the scsi interface. This could be due to RSM or it could be due to another host. High Polling rates ca interrupt the normal operation of the drive and significantly reduce performance"
The Removable Storage service isn't running (if that is the relevant service?).
HP have advised Feb 6th as the day when the replacement LTO4 Tape Drive will be available (shortage of devices apprantly), so i just wanted to know if it is the faulty tape that is likely to be causing the tape drive to backup at 160mb per min rather than 6gb per min.
The latest firmware and windows updates have been installed.