Hi,
I use 2 NAS backup from shared folder on Gb networks switch :
Qnap : 662 Mo/min (Incr Bkup from file server)
Netgear :635 Mo/min (Diff Bkup From Sql database)
Disk to tape : (LTO 3 on SCSI) 1388 Mo/min
Duplicate VM backup from qnap to netgear (with verify) : 352 Mo/min
All jobs rate are without Verify.
Another information : on SAN with LTO on SAN fiber channel (but in this case, we thinks there is something wrong on the FC & multipathing)
Backup to Deduplication folder (folder under the SAN with Hight fragmented level) :
VM backup : 5000 Mo/min (comming from the lan area)
Duplicate from deduplication folder to tape (LTO 5) : 7000 Mo/min
I hope it could help you