BIOS Disk Error Codes

  INT 13H services return with the Carry Flag set (CF=CY=1) when the
  requested service failed and it places one of the following error codes
  in AH.  These are also the values returned when disk status is requested
  (INT 13H 00H) and can be found at 0040:0041 (diskette errors) and
  0040:0074 (hard disk errors) in the BIOS Data Area.

    Note: On any error, you should reset with subfn 00H and retry 3 times.

█ŢDiskette I/O ErrorsŮ█
  These errors may be returned when DL < 81H (i.e., on diskette service
  requests).

  Err#  Error/status Description
  ▀▀▀▀  ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀
   00H  no error on last operation
   01H  bad command: invalid request to controller
   02H  bad address mark
   03H  write protect: attempted to write on write-protected diskette
   04H  sector ID bad or not found

   06H  diskette change line is active

   08H  DMA failure
   09H  DMA overrun: attempted to write across a 64K-byte boundary.

   0cH  Media type not available
   10H  bad CRC: Cyclical Redundancy Code does not agree with data
   20H  diskette controller failure
   40H  bad seek; requested track not found
   80H  time-out

█ŢHard Disk I/O ErrorsŮ█
  These errors may be returned when DL > 7fH (i.e., on hard disk service
  requests).

  Err#  Error/status Description
  ▀▀▀▀  ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀
   00H  no error on last operation
   01H  bad command: invalid request to controller
   02H  bad address mark
   03H  write protect: attempted to write on write-protected diskette
   04H  sector ID bad or not found
   05H  reset failed

   07H  drive parameter activity failed
   08H  DMA failure
   09H  DMA overrun: attempted to write across a 64K-byte boundary.
   0aH  bad sector flag detected
   0bH  bad cylinder detected

   0dH  invalid umber of sectors in format
   0eH  control data address mark detected
   0fH  DMA arbitration level out of range
   10H  uncorrectable ECC or CRC
   11H  ECC corrected data error
   20H  hard disk controller failure
   40H  bad seek; requested track not found
   80H  time-out
   aaH  drive not ready
   bbH  undefined error
   ccH  write fault on selected drive
   e0H  status error/error register 0
   ffH  sense operation failed

See Also: INT 13H: BIOS Disk I/O
          BIOS Data Area
          ROM-BIOS Functions
                                    -*-