Table 64: Device Configuration Overlay Data Structure; Table 65: Dco Error Information Definition - Hitachi IC25N040ATMR04-0 - Travelstar 40GB Laptop Hard Drive 9.5mm 2.5 Inch Notebook HDD Specifications

Table 64: Device Configuration Overlay Data structure

Word
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
15-8
7-0
Note: Bits 7–0 of this word contain the value A5h. Bits 15–8 of this word contain the data structure checksum. The
data structure checksum is the two's complement of the sum of all byte in words 0through 254 and the byte consist-
ing 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.

Table 65: DCO error information definition.

LBA High invalid word location
LBA Mid invalid bit location (bits 7:0)
Sector count error reason code & description (bits 15:8)
01h
02h
03h
04h
05h
06h
07h
08h
FFh
Content
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
See note below
Checksum
Signature (A5h)
DCO feature is frozen
Device is now Security Locked mode
Device's feature is already modified with DCO
User attempt to disable any feature enabled
Device is now SET MAX Locked or Frozen mode
Protected area is now established
DCO is not supported
Subcommand code is invalid
other reason
Travelstar 80GN Hard Disk Drive Specification
104