Figure 78. Device Configuration Overlay Data Structure - IBM IC25N020ATDA04 - Travelstar 20 GB Hard Drive Specifications
2.5 inch ata/ide hard disk drive
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Also See for IC25N020ATDA04 - Travelstar 20 GB Hard Drive:
- Quick installation manual (2 pages)
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ERROR INFORMATION EXAMPLE 2:
If the device has enabled the Security feature set and if a user attempts to disable that feature, the device
aborts that command and returns an error reason code as below.
Cylinder high
: 07h
Cylinder low
: 03h
Sector count
: 04h
Word
Content
0
0001h
1
Multiword DMA modes supported
15-3
2
1
0
2
Ultra DMA modes supported
15-6
5
4
3
2
1
0
3-6
Maximum LBA address
7
Command set/feature set supported
15-8
7
6-4
3
2
1
0
8-254
Reserved
255
Integrity word. See note below.
15-8
7-0
Figure 78. Device Configuration Overlay Data structure
Note: Bits 7:0 of this word shall contain the value A5h. Bits 15:8 of this word shall contain the data
structure checksum. The data structure checksum shall be the two's complement of the sum of all byte in
words 0 through 254 and the byte consisting of bits 7:0 of word 255. Each byte shall be added with
unsigned arithmetic, and overflow shall be ignored. The sum of all bytes is zero when the checksum is
correct.
= word 7 is invalid
= bit 3 is invalid
= now Security feature set is enabled
Data Structure revision
Reserved
1 = Multiword DMA mode 2 and below are supported
1 = Multiword DMA mode 1 and below are supported
1 = Multiword DMA mode 0 is supported
Reserved
1 = Ultra DMA mode 5 and below are supported
1 = Ultra DMA mode 4 and below are supported
1 = Ultra DMA mode 3 and below are supported
1 = Ultra DMA mode 2 and below are supported
1 = Ultra DMA mode 1 and below are supported
1 = Ultra DMA mode 0 is supported
Reserved
1 = Host Protected Area feature set supported
Reserved
1 = Security feature set supported
1 = SMART error log supported
1 = SMART self-test supported
1 = SMART feature set supported
Checksum
Signature (A5h)
Travelstar 48GH, 30GN & 15GN hard disk drive specifications
116
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