Link VTL3500 to the server via FC switch. Use NBU to make LAN-free backup, the speed is about 20M/s, which is far from it should be.
Modify LUN to ‘write back’.
When VTL configuring LUN, the default is ‘write through’, which causes read and write capability decreases.
‘Write back’ increases the capability obviously, we should take care of it when configuring, besides, according to the condition of the client, configuring the stripe depth will increase the capability.