Datasheet

Travelstar 80GN Hard Disk Drive Specification
104
Table 64: 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 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.
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 See note below
15-8 Checksum
7-0 Signature (A5h)
LBA High invalid word location
LBA Mid invalid bit location (bits 7:0)
Sector count 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