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FORMAT 4 SENSE BYTE SUMMARY (ECC Uncorrectable Data Checks)
BitO
1
2
3
4
5
6
1
Byte 8
Cylinder
High-order cylinder byte of the last count area read. (See Note.)
Address
Byte 9
Cylinder
Low-order cylinder byte of the last count area read. (See Note.)
Address
Byte 10
Head
High-order head byte of the last count area read. (See Note.)
Address
Byte 11
Head
Low-order head byte of the last count area read. (See Note.)
Address
Byte 12
Record number of the record in last count area read. (See Note.)
Record
Zero if error occurred in home address.
Number
Byte 13
Sector
Sector number of the record in error. (See Note.)
Number
Byte 22
Fault symptom code.
Byte 23
Fault symptom code.
Note:
The information
in
these bytes
is
unreliable if the message code
in
byte
7 is 0
or
4
(error occurred
in
HA), 1 or
5
(error
occurred in count area), or 9
(AM
detection failure on retry).
Figure 24. Format 4 Summary
40 IBM 3350 Reference Manual
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