4.0ATA interface

These drives use the industry-standard ATA task file interface that supports 16-bit data transfers. It supports ATA programmed input/output (PIO) modes 0–4; multiword DMA modes 0–2, and Ultra DMA modes 0–5. The drive also supports the use of the IORDY signal to provide reliable high-speed data transfers.

For detailed information about the ATA interface, refer to the draft of AT Attachment with Packet Interface Extension (ATA/ATAPI-6), NCITS T13 1410D, subsequently referred to as the Draft ATA-6 Standard.

4.1ATA interface signals and connector pins

The following table summarizes the signals on the 44-pin ATA interface connector. For a detailed description of these signals, refer to the Draft ATA-6 Standard.

Table 6:

Connector signals

 

 

 

 

 

 

 

Connector

Cable

Signal Name

Contact

Conductor

 

 

 

 

RESET-

 

1

1

 

 

 

 

DD7

 

3

3

 

 

 

 

DD6

 

5

5

 

 

 

 

DD5

 

7

7

 

 

 

 

DD4

 

9

9

 

 

 

 

DD3

 

11

11

 

 

 

 

DD2

 

13

13

 

 

 

 

DD1

 

15

15

 

 

 

 

DD0

 

17

17

 

 

 

 

Ground

 

19

19

 

 

 

 

DMARQ

 

21

21

 

 

 

 

DIOW-

 

23

23

 

 

 

 

DIOR-

 

25

25

 

 

 

 

IORDY

 

27

27

 

 

 

 

DMACK-

 

29

29

 

 

 

 

INTRQ

 

31

31

 

 

 

 

DA1

 

33

33

 

 

 

 

DA0

 

35

35

 

 

 

 

CS1FX-

 

37

37

 

 

 

 

DASP-

 

39

39

 

 

 

 

+5 V (Logic)

 

41

41

 

 

 

Ground (Return)

43

43

 

 

 

 

Cable

Connector

 

Conductor

Contact

Signal Name

 

 

 

2

2

Ground

 

 

 

4

4

DD8

 

 

 

6

6

DD9

 

 

 

8

8

DD10

 

 

 

10

10

DD11

 

 

 

12

12

DD12

 

 

 

14

14

DD13

 

 

 

16

16

DD14

 

 

 

18

18

DD15

 

 

 

20

20

(keypin)

 

 

 

22

22

Ground

 

 

 

24

24

Ground

 

 

 

26

26

Ground

 

 

 

28

28

PSYNC:CSEL

 

 

 

30

30

Ground

 

 

 

32

32

IOCS16-

 

 

 

34

34

PDIAG-

 

 

 

36

36

DA2

 

 

 

38

38

CS3FX-

 

 

 

40

40

Ground

 

 

 

42

42

+5V (Motor)

 

 

 

44

44

No connection

 

 

 

Momentus 5400.2 PATA Product Manual, Rev. B

21

Page 27
Image 27
Seagate ST93811A, ST98823A, ST96812A, ST94813A, ST9120821A ATA interface signals and connector pins, Connector signals

ST9120821A, ST98823A, ST94813A, ST9100824A, ST93811A specifications

The Seagate ST96812A, ST93811A, ST9100824A, ST94813A, and ST98823A are notable hard drive models from Seagate’s extensive lineup, each offering distinct features and technologies suitable for various computing needs. Designed predominantly for desktop and enterprise solutions, these drives showcase Seagate's commitment to performance, reliability, and innovative technology.

Starting with the ST96812A, this drive features a storage capacity of 120 GB and utilizes an ATA interface, making it a popular choice during its time for both personal computing and enterprise applications. It is engineered with a 5400 RPM spindle speed, providing a balance between performance and power efficiency. With its 2 MB cache, the ST96812A enables quick access to frequently used data, facilitating smooth operation for everyday tasks.

The ST93811A, with a capacity of 80 GB, builds on the principles of dependable storage. It also operates at 5400 RPM, ensuring consistent performance for users who rely on dependable access to their stored information. The model’s robust design includes a 2 MB buffer, enhancing data transfer speeds and improving overall system responsiveness.

Next, the ST9100824A offers a significant leap in performance with a 100 GB capacity and superior data management capabilities. This drive integrates features like Advanced Format technology, which optimizes sector size for increased storage efficiency and error correction. The spindle speed retains 7200 RPM, providing faster read and write speeds which cater well to intensive applications such as gaming or video editing.

With a focus on higher storage capacity, the ST94813A holds up to 160 GB. This model is particularly notable for its low power consumption and quiet operation, making it suitable for environments where noise reduction is crucial, such as audio production studios or home media centers. The 7200 RPM speed and enhanced cache improve overall performance for multitasking scenarios.

Lastly, the ST98823A’s 250 GB capacity positions it as a higher-end option within this series. Featuring a spindle speed of 7200 RPM and a considerable cache size, it excels in handling larger files and complex applications. This model is geared towards users seeking a fusion of speed and ample storage for applications ranging from database management to creative production.

In summary, the Seagate ST96812A, ST93811A, ST9100824A, ST94813A, and ST98823A hard drives collectively illustrate Seagate's dedication to providing various storage solutions characterized by performance, efficiency, and technological advancement tailored to meet diverse user demands.