IBM 3330 Series Reference Manual page 27

SENSE BYTES 22 AND 23
ERROR SYMPTOM CODE
Note: Contents of bytes 8-12 are unreliable if message code in byte 7 is either 0 or 4 (error occurred in HA), 1or5 (error
occurred in count area), or 9 (AM detection on retry).
MESSAGE TABLE - FORMAT 4
.
'
Sense byte 7-
bits 4 thru 7
=
0000 HA area ECC uncorrectable.
0001
Count area ECC uncorrectable.
0010
Key area ECC uncorrectable.
0011
Data area ECC uncorrectable.
0100
HA area no sync byte found.
0101
Count area no sync byte found.
0110
Key area no sync byte found.
0111
Data area no sync byte found.
1000
Not used.
1001
AM detection failure on retry.
1010-1111
Not used.
Sense Data 25