Deskstar 7K500 and Deskstar E7K500 Hard Disk Drive Specification
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10.2 Register initialization
After a power on, a hard reset, or a software reset, the register values are initialized as shown in the table below.
The meaning of the Error Register diagnostic codes resulting from power on, hard reset, or the Execute Device
Diagnostic command is shown in the figure below.
Table 66: Default Register Values
Register Default Value
Error Diagnostic Code
Sector Count 01h
Sector Number 01h
Cylinder Low 00h
Cylinder High 00h
Device/Head A0h
Status 50h
Alternate Status 50h
Table 67: Diagnostic codes
Code Description
01h No error detected
02h Formatter device error
03h Sector buffer error
04h ECC circuitry error
05h Controller microprocessor error
8xh Device 1 failed
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