5K250 (SATA) OEM Specification
Page 79 of 171
Word Content
0 0002h 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
15-9 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 = Security feature set supported
2 1 = SMART error log supported
1 1 = SMART self-test supported
0 1 = SMART feature set supported
8 SATA feature
15-5 Reserved
4 1 = Software setting preservation supported
3 Reserved
2 1 = Interface power management supported
1 1 = Non-zero buffer offset in DMA Setup FIS supported
0 1 = Native command queuing supported
9-254 Reserved
255 Integrity word <Note .>
15-8 Checksum
7-0 Signature (A5h)
Table 46 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 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.
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