Table 56: Default Register Values; Table 57: Diagnostic Codes; Register Initialization - Hitachi HDT725025VLA380 - Deskstar 0A33423 T7K500 250GB SATA 7200RPM 8MB Cache Hard Drive Specifications

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.
Table 57: Default Register Values
Register
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
Alternate Status
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 58: Diagnostic codes
Code
01h No error detected
02h Formatter device error
03h Sector buffer error
04h ECC circuitry error
05h Controller microprocessor error
8xh Device 1 failed
Default Value
Diagnostic Code
01h
01h
00h
00h
A0h
50h
50h
Description
Deskstar T7K500 Hard Disk Drive Specification
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