4.1.2Identify Device command

The Identify Device command (command code ECH) transfers information about the drive to the host following power up. The data is organized as a single 512-byte block of data, whose contents are shown in Table 7 on page 22. All reserved bits or words should be set to zero. Parameters listed with an “x” are drive-specific or vary with the state of the drive. See Section 2.0 on page 3 for default parameter settings.

The following commands contain drive-specific features that may not be included in the Draft ATA-6 Standard.

Word

Description

Value

 

 

 

0

Configuration information:

0C5AH

 

• Bit 15: 0 = ATA; 1 = ATAPI

 

 

• Bit 7: removable media

 

 

• Bit 6: removable controller

 

 

• Bit 0: reserved

 

 

 

 

1

Number of logical cylinders

16,383

 

 

 

2

ATA-reserved

0000H

 

 

 

3

Number of logical heads

16

 

 

 

4

Retired

0000H

 

 

 

5

Retired

0000H

 

 

 

6

Number of logical sectors per logical track: 63

003FH

 

 

 

7–9

Retired

0000H

 

 

 

10–19

Serial number: (20 ASCII characters, 0000H = none)

ASCII

 

 

 

20

Retired

0000H

 

 

 

21

Retired

0400H

 

 

 

22

Obsolete

0000H

 

 

 

23–26

Firmware revision

x.xx

 

(8 ASCII character string, padded with blanks to end of string)

 

 

 

 

27–46

Drive model number (40 ASCII characters, padded with blanks

ST9120821A

 

to end of string)

ST9100824A

 

 

ST98823A

 

 

ST96812A

 

 

ST94813A

 

 

ST93811A

 

 

 

47

(Bits 7–0) Maximum sectors per interrupt on Read multiple and

8010H

 

Write multiple (16)

 

 

 

 

48

Reserved

0000H

 

 

 

49

Standard Standby timer, IORDY supported and may be disabled

2F00H

 

 

 

50

ATA-reserved

0000H

 

 

 

51

PIO data-transfer cycle timing mode

0200H

 

 

 

52

Retired

0200H

 

 

 

53

Words 54–58, 64–70 and 88 are valid

0007H

 

 

 

54

Number of current logical cylinders

xxxxH

 

 

 

55

Number of current logical heads

xxxxH

 

 

 

56

Number of current logical sectors per logical track

xxxxH

 

 

 

Momentus 5400.2 PATA Product Manual, Rev. B

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Image 31
Seagate ST96812A, ST98823A, ST94813A, ST93811A, ST9120821A, ST9100824A manual Identify Device command, Word Description Value

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.