IBM IC25N020ATDA04 - Travelstar 20 GB Hard Drive - Execute Device Diagnostic (90 H); Figure 81. Execute Device Diagnostic Command (90 H)

13.4 Execute Device Diagnostic (90h)
see belowStatus1 0 0 1 0 0 0 0Command
- - - - - - - -Device/Head1 - 1 - - - - -Device/Head
- - - - - - - -Cylinder High- - - - - - - -Cylinder High
- - - - - - - -Cylinder Low- - - - - - - -Cylinder Low
- - - - - - - -Sector Number- - - - - - - -Sector Number
- - - - - - - -Sector Count- - - - - - - -Sector Count
see belowError- - - - - - - -Feature
- - - - - - - -Data- - - - - - - -Data
7 6 5 4 3 2 1 0Register7 6 5 4 3 2 1 0Register
Command Block Input RegistersCommand Block Output Registers
0-0--000VVVVVVV0
ERRIDXCORDRQDSCDFRDYBSYAMNT0NABT0IDN0UNCCRC
0123456701234567
Status RegisterError Register
Figure 81. 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 61 on page 79 for the definition.
Travelstar 48GH, 30GN & 15GN hard disk drive specifications
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