4.3.1Identify 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 the table on page 27. 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 Serial ATA specifica- tion.

Word

Description

Value

 

 

 

 

Configuration information:

0C5AH

 

• Bit 15: 0 = ATA; 1 = ATAPI

 

0

• 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 (8 ASCII character string, padded with

x.xx

 

blanks to end of string)

 

 

 

 

27–46

Drive model number: (40 ASCII characters, padded with

ST9250827AS

 

blanks to end of string)

ST9200827AS

 

 

ST9160827AS

 

 

ST9120817AS

 

 

 

47

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

8010H

 

and Write multiple (16)

 

 

 

 

48

Reserved

0000H

49

Standard Standby timer, IORDY supported and may be dis-

2F00H

 

abled

 

 

 

 

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

 

 

 

26

Momentus 5400.4 SATA Product Manual, Rev. A

Page 34
Image 34
Seagate ST9160827AS, ST9250827AS, ST9200827AS, ST9120817AS manual Identify Device command, Word Description Value

ST9120817AS, ST9160827AS, ST9200827AS, ST9250827AS specifications

The Seagate ST9250827AS, ST9200827AS, ST9160827AS, and ST9120817AS are notable hard drives that have made their mark in the storage industry, primarily due to their reliable performance, capacity options, and advanced technologies. Each model is tailored to meet the needs of different user scenarios, making them versatile choices for both personal and enterprise applications.

The ST9250827AS, with a capacity of 250GB, is designed for users requiring sufficient storage for general applications. Ideal for laptops and external drives, it offers a 5400 RPM spindle speed, ensuring quick access times and efficient data retrieval. The drive also incorporates Seagate’s Advanced Power Management technology, which helps extend battery life in portable devices by optimizing power consumption.

The ST9200827AS steps up with a 320GB capacity, catering to users needing increased storage for larger files, applications, and media collections. With similar 5400 RPM performance, it balances speed and energy efficiency. This model is suitable for those looking to enhance their mobile experience without sacrificing performance.

The ST9160827AS, a 160GB variant, is a compact solution for users needing a smaller footprint. It retains the energy efficiency and power management features present in the other models while delivering adequate performance for everyday computing tasks. This model is particularly suited for older machines or as a secondary drive in systems where space is at a premium.

Lastly, the ST9120817AS, with its 120GB capacity, is the smallest of the lot, perfect for basic storage needs. It’s well-suited for entry-level laptops or as a backup option for essential data. While its capacity may be limited compared to the others, it maintains the same reliability and efficiency attributed to Seagate’s technology.

All four models utilize Seagate's Drive Trust Technology, ensuring data integrity and security. They are built using Seagate's hard drive technologies that emphasize durability and reliability. These drives are also equipped with a SATA interface, facilitating fast data transfer rates and seamless integration with a wide range of computing devices.

In summary, the Seagate ST9250827AS, ST9200827AS, ST9160827AS, and ST9120817AS hard drives provide varying capacities and consistent performance, catering to diverse user requirements. Their blend of energy-efficient operation, advanced technology, and dependable storage solutions make them suitable for both personal and professional use, ensuring reliable data management across all applications.