Fujitsu MAN3184, MAN3367, MAN3735 SERIES DISK DRIVES Sksv MSB, Sense key inherent information

(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	7	6	5		4		3	2	1	0
Byte
15	SKSV	0	0	0		0		0	0	0
16						X‘00’
17				Number of retries executed
(b)
Bit	7	6	5		4		3	2	1	0
Byte
15	SKSV	0	0	0		0		0	0	0
16	[MSB]			Progressing rate of formatting
						or
17
			Progressing rate of Self-Test operation							[LSB]

Figure 5.2 Sense key inherent information

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