8. Drive Diagnostics
SONY AIT-1/2 drive SDX-460V series Ver. 1.0
8-5
8.2.5.
RECEIVE DIAGNOSTIC RESULT Command
Whenever a diagnostic test is executed, the drive automatically prepares a diagnostic test result that can be
returned to the host computer when a RECEIVE DIAGNOSTIC RESULT command is issued.
If the PF bit in the SEND DIAGNOSTIC command was sent to one, the diagnostic test result will be preceded by a
four byte header which will be of the form:
Table 8-3: RECEIVE DIAGNOSTICS RESULT – SCSI-2 Header
Bit
Byte
7 6 5 4 3 2 1 0
0
Page Code (81h)
1
Reserved
2
(MSB)
3
Page Length (00 005h)
(LSB)
Regardless of the PF bit in the SEND DIAGNOSTIC command, the five bytes of diagnostic test result information
will be of the form:
Table 8-4: RECEIVE DIAGNOSTIC Result
Bit
Byte
7 6 5 4 3 2 1 0
0
Reset Error
Time
Re-Sync
Reserved Error
Set
1
Error Code
2
Result A
3
Result B
4
Diagnostic Test Number
Reset error:
This bit is set when an error occurs during power-on self-test.
Time Re-Sync:
This bit indicates that the time stamp saved with the error log has no relation to that of the
previous entry. It is only set by the logging routine within the data buffer as an error is logged.
Error set:
Two set of error codes exist. The definition of the error is dependent upon when set is taken from as
follows:
0 - Runtime errors
2 - Drive diagnostic errors
Error code:
Error codes for each error set are described in clause 8.2.6.
Result A:
Typically this byte indicates the logical sub-assembly that failed:
1 - Drive Mechanism
2 - Drive Circuitry
Note:
This byte has alternate meanings with some diagnostics. Refer to clause 8.2.6.
Result B:
Typically this byte is unused however, this byte has alternate meanings with some diagnostics. Refer to
clause 8.2.6.
Test number:
This is the test number to which the message applies (if a test fails within a sequence, the
individual test number will be returned).
Note:
Diagnostic test 30 (Front Panel Check) will light each of the front panel LEDs so that the operator can verify
that the LEDs are functioning. There is no error detection within the drive for this test and therefore the Error Code,
Result A and Result B will always be ZERO.
Содержание AIT-SDX460
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