Hitachi 7K400 Specifications - Page 135
Execute Device Diagnostic 90h
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12.5 Execute Device Diagnostic (90h) Table 84: Execute Device Diagnostic command (90h) Command Block Output Registers Register 7 6 5 4 3 2 1 0 Data Feature Sector Count Sector Number Cylinder Low Cylinder High Device/Head 1 - 1 - - - - - Command 1 0 0 1 0 0 0 0 Command Block Input Registers Register 7 6 5 4 3 2 1 0 Data Error see below Sector Count Sector Number Cylinder Low Cylinder High Device/Head Status see below 76 CRC UNC VV Error Register 54 3 2 1 0 0 IDN 0 ABT T0N AMN VV V V V V Status Register 7 654 3 2 1 0 BSY RDY DF DSC DRQ COR IDX ERR 0 V0- - 0 - 0 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 67: "Default Register Values" on page 76 for the definition. Deskstar 7K400 Hard Disk Drive Specification 121
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