To Switch of the autoverify feature on a 3ware controller which can be a real performance killer do the following:

First check the current status:

tw_cli /c0/u0 show autoverify
/c0/u0 Auto Verify Policy = on


As you can see the autoverify feature is on Auto Verify Policy = on. If your raid controller is also c0 and you unit is u0 you may use the following command. Please check this first with the command:

tw_cli /c0 show

Do not just copy and paste. If c0 doesn’t work try a higher number it depends on which pci slot your controller is in.

tw_cli /c0/u0 set autoverify=off
Setting Auto-Verify Policy on /c0/u0 to [off] ... Done.


Check the autoverify settings:

tw_cli /c0/u0 show autoverify
/c0/u0 Auto Verify Policy = off


That’s it no more autoverify. Please make sure to check you raid status regularly to detect problems.