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Sense Data Error Recovery Methods
5 - 4 C141-E167
(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