Table 55.Execute Device Diagnostic Command (90H); Execute Device Diagnostic (90H) - Hitachi 7K250 - Deskstar - Hard Drive Specifications
3.5 inch ultra ata/100 hard disk drive
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12.3 Execute Device Diagnostic (90h)
Table 56: Execute Device Diagnostic command (90h)
Command Block Output Registers
Register
Data
Feature
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Command
7
6
5
CRC UNC
0
V
V
V
The Execute Device Diagnostic command performs the internal diagnostic tests implemented by the device. The
results of the test are stored in the Error Register.
The normal Error Register bit definitions do not apply to this command. Instead, the register contains a diagnostic
code. See Table 43: "Default Register Values" on page 74 for the definition.
7 6 5 4 3 2 1 0
- - - - - - - -
- - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
1 - 1 - - - - -
1 0 0 1 0 0 0 0
Error Register
4
3
2
1
IDN
0
ABT T0N AMN
V
V
V
V
Deskstar 7K250 Hard Disk Drive Specification
Command Block Input Registers
Register
Data
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
0
7
6
BSY RDY DF DSC DRQ
V
0
V
114
7 6 5 4 3 2 1 0
- - - - - - - -
see below
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
see below
Status Register
5
4
3
2
COR IDX
0
-
-
0
1
0
ERR
-
0
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