I'm using Backup Exec 11d with latest patches installed and the Symatnec drivers for the SDX-700c Sony AIT-3 tape drive.
I have been unable to get hardware compression going at all on my tapes. I was doing software compression, which worked okay, but have switched to disk-to-disk-to-tape which does not support software compression. I have hardware compression enabled in the device properties and in my backup jobs. However, when I actually do a backup, I get slightly less than the tape capacity (i.e. 96GB on a 100GB tape). The compression ratio for the media is blank, as well. I can't find anything in the logs indicating that compression was used, not used, or anything really even related to compression.
Having tried all that, I'm stumped as to what the cause might be. I've tried several tapes, checked firmware, etc.
Any help would be extremely appreciated.