Write-verify policies

Using the write-verify option causes all Write operations to be verified by an immediate follow-up Read operation to check the success of the Write.

If the Write operation is not successful, you get an error message. This policy enhances availability but degrades performance because of the extra time needed for the Read. You can specify the use of a write-verify policy on a logical volume either when you create it using the mklv command, or later by changing it with the chlv command.