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The read and write capability is weak caused by the LUN configuration 'write through'

Publication Date:  2012-10-15 Views:  140 Downloads:  0

Issue Description

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.

Alarm Information


Handling Process

Modify LUN to ‘write back’.

Root Cause

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.