Execute Device Diagnostic (90H); Table 68: Execute Device Diagnostic Command (90H) - Hitachi HTS421212H9AT00 - Travelstar 120 GB Hard Drive Specifications

13.3 Execute Device Diagnostic (90h)

Table 68: Execute Device Diagnostic command (90h)

Command Block Output Registers
Register
Data
Feature
Sector Count
LBA Low
LBA Mid
LBA High
Device
Command
Error Register
7 6 5
CRC UNC 0
0 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 49: "Diagnostic codes" on page 70 for the definition.
7 6 5 4 3 2 1 0
- - - - - - - -
- - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
1 0 0 1 0 0 0 0
4 3 2 1
IDN 0 ABT T0N AMN
V V V V
Travelstar 4K120 Hard Disk Drive Specification
Command Block Input Registers
Register
Data
Error
Sector Count
LBA Low
LBA Mid
LBA High
Device
Status
0 7 6 5
BSY RDY DF DSC DRQ
V 0 0 0
107
7 6 5 4 3 2 1 0
- - - - - - - -
see below
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
see below
Status Register
4 3 2 1
COR IDX
- - 0 -
0
ERR
0