IBM IC25N020ATDA04 - Travelstar 20 GB Hard Drive - Figure 60. Default Register Values; Figure 61. Diagnostic Codes; Register Initialization

11.1.1 Register initialization
After a power on, a hard reset, or a software reset, the register values are initialized as shown in the table
below.
50hAlternate Status
50hStatus
A0hDevice/Head
00hCylinder High
00hCylinder Low
01hSector Number
01hSector Count
Diagnostic CodeError
Default ValueRegister
Figure 60. Default Register Values
As a result of carrying out an Execute Device Diagnostic command or being powered on, or if a hard reset
occurs — the system generates an Error Register diagnostic code. See the table below for a description of
the various codes.
Device 1 failed8xh
Controller microprocessor error05h
ECC circuitry error04h
Sector buffer error03h
Formatter device error02h
No error detected01h
DescriptionCode
Figure 61. Diagnostic Codes
Travelstar 48GH, 30GN & 15GN hard disk drive specifications
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