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5.3 Host Commands
C141-E239 5-43
(7) EXECUTE DEVICE DIAGNOSTIC (X’90’)
This command performs an internal diagnostic test (self-diagnosis) of the device.
The device reports the diagnostic result and status to the host.
Table 5.7 lists the diagnostic code written in the Error field which is 8-bit code.
Table 5.7 Diagnostic code
Code Result of diagnostic
X’00’
X’01’
X’02’
X’03’
X’04’
X’05’
X’06’
Format Unit is not completed.
No error detected.
HDC diagnostic error
Data buffer diagnostic error
Memory diagnostic error
Reading the system area is abnormal
Calibration abnormal
Note: The device responds to this command with the result of
power-on diagnostic test.
• Error reporting conditions
(1) A SATA communication error occurred (ST = 51h, ER = 14h).
At command issuance (Shadow Block Registers setting contents)
CM 1 0 0 1 0 0 0 0
DH x x x x HD No. /LBA
CH
CL
SN
SC
FR
xx
xx
xx
xx
xx
At command completion (Shadow Block Registers contents to be read)
ST Status information
DH x x x x HD No. /LBA
CH)
CL
SN
SC
ER
xx
xx
01H
01H
Diagnostic code