IBM DTCA-24090 Hard Drive Specifications - Page 108

Execute Device Diagnostic

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12.2 Execute Device Diagnostic (90h) Command Block Output Registers Register 76543210 Data Feature Sector Count Sector Number Cylinder Low Cylinder High Device/Head 11 Command 10010000 Command Block Input Registers Register 76543210 Data Error ...See Below... Sector Count Sector Number Cylinder Low Cylinder High Device/Head Status ...See Below... Error Register 76543210 CRC UNC 0 IDN 0 ABT T0N AMN 0VVVVVVV Status Register 76543210 BSY RDY DF DSC DRQ COR IDX ERR 000 0 0 Figure 58. Execute Device Diagnostic Command (90h) 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 Figure 46 on page 69 for the definition. 100 OEM Specifications of DTCA-2xxxx 2.5 inch H D D

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12.2
Execute Device Diagnostic
(90h)
Command Block Output Registers
Command Block Input Registers
Register
76543210
Register
76543210
Data
Data
Feature
Error
...See Below...
Sector Count
Sector Count
Sector Number
Sector Number
Cylinder Low
Cylinder Low
Cylinder High
Cylinder High
Device/Head
1
1
Device/Head
Command
10010000
Status
...See Below...
Error Register
Status Register
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
CRC UNC
0
IDN
0
ABT T0N AMN
BSY RDY DF
DSC DRQ COR IDX ERR
0
V
V
V
V
V
V
V
0
0
0
0
0
Figure 58. Execute Device Diagnostic Command (90h)
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 Figure 46 on page 69 for the definition.
100
OEM Specifications of DTCA-2xxxx 2.5 inch HDD