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▀ This function provides increased data integrity by allowing the user to
  force a read-after-write verify of all data written to the disk, if
  that capability is supported by the manufacturer's disk driver.
 
▀ Because read-after-write verification slows disk operations, the de-
  fault setting of the verify flag is OFF.
 
▀ The current state of the verify flag can be determined using Int 21H
  Function 54H.
 
▀ The state of the verify flag is also controlled by the MS-DOS commands
  VERIFY OFF and VERIFY ON.
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