Running BW 2010 R2 on Win2K8R2 server with NW agent running on NW 6.5

The backup of my GW files (library - 500,000 docs) is very slow - takes
about 30 hours to write let alone verify - btw, my GW files are being
backup up from a backup directory after a DBCOPY- not the live folder.

The servers are connected via GB network and the backup is run during
very low usage time (weekend). Backup device is an SCSI LTO lcoally
attached to the Win2k8R2 server

Anything I should be looking at here ?

TSEAFS (6.55.03) is loaded although I'm not sure it plays a role with a
remote backup system