Server: HP DL380, 2) 3.8 processors, 2GB RAM, single RAID 5 array w/5 disks on a 6i array controller
Tape Drive: Ultirum 960 connected to a 64-bit/133-MHz pci-x dual channel Ultra320 HBA
Application: Symantec Back-Up Exec 10d
The drive claims hugh transfer rates (576GB/hr) or 160MB/s compressed, 80MB/s native. The controller claims up to 320MB/s.
When we run backups, we are getting something in the neighborhood of 14MB/s. At worst I figured we would see 80MB/s.
We have replaced controllers, drivers, and firmware. Any ideas about what may be behind the slow speeds? Is it reasonable to expect the higher speeds given the configuration listed above?