We are backing up an Exchange environment that has 48 GB of data. The program that we use is Symantec Backup Exec 2012 SP1a. The information is being backed up to a Tandberg LT04 tape library.
The transfer rate drops below 20 MB per minute and the backup eventually fails with the "error querying writer status" error.
The SQL cluster is backing up at over 1000 MB per minute.
Why the difference is transfer rates? Is there anything I can do to speed this up?