How to check the Backup Throughput and Performace.
Master Server :
OS - LINUX_RH_X86
NBU Version - 18.104.22.168
OS - Linux 22.214.171.124-0.7-default-fsl
NBU Appliance 5230
NBU Appliance Version is 126.96.36.199.
Current speed : 150 GB/Hour
You must clearly know how to check the backup performance as you listed it in your post "150GB/Hour". So what do you actually want to determine?
If you feel that you need to improve performance, look for the Performance Tuning manuals - there is one for NetBackup and one for Appliances.