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C141-E124-01EN5 - 4
(6) Additional sense data length
This field indicates the length (number of bytes) after byte 8 of the sense data. The value shown in
this field shows the length of sense data provided by the IDD without relation to the value
specified in the “Transfer byte length” in the CDB of the REQUEST SENSE command. The
length of the IDD’s sense data is fixed at 48 bytes and this field always indicates X ‘28’ (40
bytes).
(7) Command inherent information
This field indicates information that is inherent to the command where the error occurred. The
only command for which the value in this field is valid in the IDD is the REASSIGN BLOCKS
command. See the description of the REASSIGN BLOCKS command (Section 3.3.2) concerning
details of the information shown in this field.
(8) Sense code, sub-sense code
The codes which indicate the reason for the error displayed by the sense key in detail are reported
in these fields. The INIT can decide procedures for error recovery according to the sense key and
these fields. The sense code and sub-sense code are defined in Table 5.2.
(9) SKSV (sense key specific valid), sense key inherent information
When the sense key indicates one of “RECOVERED ERROR [=1],” “MEDIUM ERROR [=3]” or
“HARDWARE ERROR [=4],” and the “SKSV” bit indicates “1,” indicates the number of times the IDD
has attempted to recover from the detected error as shown in Figure 5.2 (a).
When the sense key indicates “NOT READY [=2]” and the “SKSV” bit indicates “1”, indicates the
progressing rate of the formatting operation by the FORMAT UNIT command with [n/65536] as
shown in Figure 5.2 (b) or the progressing rate of the drive self-test operation by the SEND
DIAGNOSTICS command (Self-Test = 0).
(a)
Bit
Byte
76543210
15SKSV0000000
16 X‘00’
17 Number of retries executed
(b)
Bit
Byte
76543210
15SKSV0000000
16
17
[MSB] Progressing rate of formatting
or
Progressing rate of Self-Test operation [LSB]
Figure 5.2 Sense key inherent information