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ERROR INFORMATION EXAMPLE 2:
When the device is enabled and the Security feature is set, if the user attempts to disable that feature, the
device aborts that command and returns an error reason code as below.
Cylinder high
Cylinder low
Sector count
Word
Content
0
0001h
Data Structure revision
1
Multiword DMA modes supported
15-3
Reserved
2
1 = Multiword DMA mode 2 and below are supported
1
1 = Multiword DMA mode 1 and below are supported
0
1 = Multiword DMA mode 0 is supported
2
Ultra DMA modes supported
15-6
Reserved
5
1 = Ultra DMA mode 5 and below are supported
4
1 = Ultra DMA mode 4 and below are supported
3
1 = Ultra DMA mode 3 and below are supported
2
1 = Ultra DMA mode 2 and below are supported
1
1 = Ultra DMA mode 1 and below are supported
0
1 = Ultra DMA mode 0 is supported
3-6
Maximum LBA address
7
Command set/feature set supported
15-8
Reserved
7
1 = Host Protected Area feature set supported
6-4
Reserved
3
1 = Security feature set supported
2
1 = SMART error log supported
1
1 = SMART self-test supported
0
1 = SMART feature set supported
8-254
Reserved
255
Integrity word
15-8
Checksum
7-0
Signature (A5h)
Figure 78. Device Configuration Overlay Data structure
Note: Bits 7–0 of this word contain the value A5h. Bits 15–8 of this word contain the data structure check-
sum. The data structure checksum is 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 is added with unsigned arithmetic, and overflow
is ignored. The sum of all bytes is zero when the checksum is correct.
:
07h
= word 7 is invalid
:
03h
= bit 3 is invalid
:
= now Security feature set is enabled
04h
<see note below>
Hitachi Travelstar 60GH & 40GN hard disk drive specifications
114
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