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Western Digital Hard Disk Drive OEM Specification
9.1.1 Register Initialization
Table 33 Default Register Values
After power on, hard reset, or software reset, the register values are initialized as shown in Table 33.
Controller microprocessor error
Table 34 Diagnostic Codes
The meaning of the Error Register diagnostic codes resulting from power on, hard reset or the Execute Device
Diagnostic command is shown in Table 34.
9.2 Diagnostic and Reset Considerations
In each case of Power on Reset, COMRESET, Soft reset, and EXECUTE DEVICE DIAGNOSTIC command, the
device is diagnosed. An Error register is set as shown in Table 34.
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