AT&T 6300 Service Manual page 318

DIAGNOSTICS
LOW-LEVEL FORMAT ERROR MESSAGE TABLE
Messages / Explain Hexadecimal Code
BAD COMMAND
ADDR MARK NOT FOUND
SECTOR NOT FOUND
RESET FAILED
OPERATION FAILED
DMA BOUNDARY
BAD TRACK FLAG
BAD ECC ON READ
ECC CORRECTED DATA
HDU CONTROLLER FAILURE
BAD SEEK
TIME OUT
UNKNOWN ERROR
SENSE FAIL
OxOI
Ox02
Ox04
Ox05
Ox07
Ox09
OxOb
OxlO
Oxll
Ox20
Ox40
Ox80
Oxbb or other
Oxff
Some of these error messages (hexadecimal code) are error codes
from the Bad Track Table. The message explains the error code.
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