Hitachi 100GB 7200 RPM HTE721010G9SA00 User Manual

Travelstar E7K100 (SATA) Hard Disk Drive Specification

78 

Note: Bits 7–0 of this word contain the value A5h. Bits 15–8 of this word contain the data structure checksum. The data struc-
ture checksum is the two's complement of the sum of all byte in words 0through 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 check-
sum is correct.

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

15-9

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

Automatic Acoustic Mode status

9

Automatic Acoustic Mode current value

10

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 EIS sup-

ported

0

1 = Native command queuing supported

11-254

Reserved

255

Integrity word 

15-8

Checksum

7-0

Signature (A5h)

LBA High

invalid word location