Int 13 Fn 0D  - Hard Disk - Reset Hard Disks                               [d]

   AH = 0Dh
   DL = drive number (80h = first, 81h = second hard disk)

Return: CF set on error
   CF clear if successful
   AH = status (see AH=01h)

Notes: reinitializes the hard disk controller, resets the specified drive's
     parameters, and recalibrates the drive's heads (seek to track 0)
   not for PS/2 ESDI drives

See Also: AH=00h,INT 21/AH=0Dh