The verify function performs a byte-by-byte comparison of copied disks to
the original disk or an image file as it is copied to ensure that they are
exactly the same for all of the tracks that have data on the master. Disks
can be compared either while they are copied, by setting Verify to Always
under the Job Window, or in a separate compare pass.
If there are any errors on the disk, DiskDupe will show a message on the
screen indicating that the disk is bad.
See also: Serial String and Track Range