IBM IC25N020ATDA04 Hard Drive Specifications - Page 93

Register initialization, Cylinder Low

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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. Register Error Sector Count Sector Number Cylinder Low Cylinder High Device/Head Status Alternate Status Default Value Diagnostic Code 01h 01h 00h 00h A0h 50h 50h 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. Code 01h 02h 03h 04h 05h 8xh Description No error detected Formatter device error Sector buffer error ECC circuitry error Controller microprocessor error Device 1 failed Figure 61. Diagnostic Codes Travelstar 48GH, 30GN & 15GN hard disk drive specifications 79

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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.
50h
Alternate Status
50h
Status
A0h
Device/Head
00h
Cylinder High
00h
Cylinder Low
01h
Sector Number
01h
Sector Count
Diagnostic Code
Error
Default Value
Register
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 failed
8xh
Controller microprocessor error
05h
ECC circuitry error
04h
Sector buffer error
03h
Formatter device error
02h
No error detected
01h
Description
Code
Figure 61. Diagnostic Codes
Travelstar 48GH, 30GN & 15GN hard disk drive specifications
79