I have a Windows 2012 Standard Server with 2 x 1Gbps uplinks to our network backbone. The backup device is an external SAS single drive LTO5 drive, capable of 6Gbps throughput. The target backup server is a RedHat 5.9 Linux Server, with a 10 Gbps uplink to our network, with a RAID10 drive set across 8 x 1TB disks. The dataset I'm backing up is around 3TB, but the throughput on the backup job seems to only run around 30000 KBps (1.8GB/min)..
Are there any things I should do to try and increase this throghput, to get my full-pass backup window shorter?
Would I be better off doing a disk-to-disk backup, to get the data set backed up first, and then doing a disk-to-tape backup from the copied location, to offset stressing the original backup source?