Table 66: Device Configuration Overlay Data Structure; Table 67: Dco Error Information Definition - Hitachi HTS421212H9AT00 - Travelstar 120 GB Hard Drive Specifications

Table 66: Device Configuration Overlay Data structure

Word
0 0001h
1 Multiword DMA modes supported
15-3
2 Ultra DMA modes supported
15-6
3-6 Maximum LBA address
7 Command set/feature set supported
15-9
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 67: DCO error information definition.

LBA High
LBA Mid
LBA Low
Sector count
Data Structure revision
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
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
Reserved
8 1 = 48-bit Addressing feature set supported
7 1=Host Protected Area feature set supported
6 1 = Automatic acoustic management supported
5 Reserved
4 1 = Power-Up in Standby feature set supported
3 1 = SMART feature set supported
2 1 = SMART error log supported
1 1 = SMART sefl-test supported
0 1 = SMART feature set supported
See note below
Checksum
Signature (A5h)
invalid word location
invalid bit location (bits 7:0)
Invalid bit location (bits 15:8)
error reason code & description (bits 15:8)
01h DCO feature is frozen
02h Device is now Security Locked mode
03h Device's feature is already modified with DCO
04h User attempt to disable any feature enabled
05h Device is now SET MAX Locked or Frozen mode
06h Protected area is now established
07h DCO is not supported
08h Subcommand code is invalid
FFh other reason
Travelstar 4K120 Hard Disk Drive Specification
Content
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