Hitachi 100GB 7200 RPM HTE721010G9SA00 User Manual
Product codes
HTE721010G9SA00
Travelstar E7K100 (Serial ATA) Hard Disk Drive Specification
48
10.2 Register initialization
After a power on, COMRESET, 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, COMRESET or the Execute Device
Diagnostic command are shown in the following table.
Diagnostic command are shown in the following table.
10.3 Diagnostic and Reset considerations
The Set Max, the Set Max security mode and the Set Max unlock counter don't retain over a Power On Reset but
persist over a COMRESET or Soft Reset.
persist over a COMRESET or Soft Reset.
For each Reset and Execute Device Diagnostic, the Diagnostic is done as follows:
Execute Device Diagnostic
In all the above cases: Power on, COMRESET, Soft reset, and the EXECUTE DEVICE DIAGNOSTIC command
the Error register is shown in the following table.
the Error register is shown in the following table.
Where X indicates the appropriate Diagnostic Code for the Power on, COMRESET, Soft reset, or Device Diagnostic
error.
error.
10.4 Power-off considerations
10.4.1 Load/Unload
Load/Unload is a functional mechanism of the HDD. It is controlled by the drive microcode. Specifically, unload-
Table 29: 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 30: Diagnostic codes
Code
Description
01h
No error detected
02h
Formatter device error
03h
Sector buffer error
04h
ECC circuitry error
05h
Controller microprocessor error
Device 0 Passed
Error Register
Yes
01h
No
Oxh