Execute Device Diagnostic (90H); Figure 73. Execute Device Diagnostic Command (90H) - IBM DJSA-210 - Travelstar 10 GB Hard Drive Specifications

13.3 Execute Device Diagnostic (90h)

Command Block Output Registers
Register
Data
Feature
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Command
Error Register
7 6 5
CRC UNC 0
0 V V

Figure 73. 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 56 on page 73 for the definition.
7 6 5 4 3 2 1 0
– – – – – – – –
– – – – – – – –
– – – – – – – –
– – – – – – – –
– – – – – – – –
– – – – – – – –
1 – 1 – – – – –
1 0 0 1 0 0 0 0
4 3 2 1 0
IDN 0 ABT T0N AMN
V V V V V
Travelstar 32GH/30GT/20GN hard disk drive specifications
Command Block Input Registers
Register
Data
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
Status Register
7 6 5 4
BSY RDY DF DSC
0 0 0 –
109
7 6 5 4 3 2 1 0
– – – – – – – –
see below
– – – – – – – –
– – – – – – – –
– – – – – – – –
– – – – – – – –
– – – – – – – –
see below
3 2 1 0
DRQ COR IDX ERR
– 0 – 0