The description below is from the book DOS the Easy Way by Everett Murdock Ph.D.
CLICK HERE for information about downloading the book.
Type: Internal (2.0 and later)
Purpose: Verifies that data written to disk was correctly
The VERIFY command has the same purpose as the /V parameter in the COPY
once set, you do not have to use the /V option while copying. After
been set to ON, DOS checks for bad sectors following all data writes to
This can cause a slowing of such operations.
An error message is displayed only if DOS was unable to successfully
data to disk.
If you enter the command with no options , DOS will display the current
To tell DOS to verify all writes to disk, enter
DOS will check to be sure that each write to disk was carried out
This condition remains in effect until you enter