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 Table 8 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 Serial ATA specification.

WORD

DESCRIPTION

VALUE

 

 

 

0

General configuration

0040H

1

Number of logical cylinders (obsolete) 16,383

3FFFH

2

Specific configuration

C837H

3

Number of logical heads (obsolete) 16

0010H

4-5

Retired

0000H

6

Number of logical sectors per logical track (obsolete) 63

003FH

7–8

Reserved for CompactFlash Association

0000H

9

Retired

0000H

10–19

Serial number: (ATA ASCII string padded with spaces (20H))

ASCII

20-21

Retired

0000H

22

Obsolete

0000H

23–26

Firmware revision (ATA ASCII string padded with spaces (20h))

ASCII

 

 

 

27–46

Model number (ATA ASCII string padded with spaces (20h))

ASCII

 

 

 

47

(Bits 7-0) Maximum number of logical sectors that shall be transferred per DRQ data

8010H

 

block on READ/WRITE MULTIPLE commands. 16

 

48

Reserved for Trusted Computing feature set options

4000H

49

Capabilities – Standby Timer, IORDY Support, etc

2F00H

50

Capabilities Continued

4000H

51

PIO data transfer cycle timing option (Obsolete)

0000H

52

Retired

0000H

53

Words 54–58, 64–70 and 88 are valid

0006H

54

Number of current logical cylinders (Obsolete)

3FFFH

55

Number of current logical heads (Obsolete)

0010H

56

Number of current logical sectors per logical track (Obsolete)

003FH

57–58

Current capacity in sectors (Obsolete)

FC10H 00FBH

59

Number of LBAs transferred per Read Multiple or Write Multiple. Sanitize Command

9110H

 

Support

 

60–61

Total number of user addressable logical sectors for 28-bit commands Note: The maxi-

XXXXXXXXH

 

mum value allowed in this field is: 0FFFFFFFh. If this field contains 0FFFFFFFh and the

 

 

device has user addressable LBAs greater than or 137GB, then words 100..103 contain

 

 

the total number of user addressable LBAs

 

 

 

 

62

Obsolete

0000H

63

Multiword DMA active and modes supported

0007H

 

(see note following this table)

 

64

Advanced PIO modes supported. SATA = 0003h

0003H

65

Minimum Multiword DMA transfer cycle time per word (120ns)

0078H

66

Recommended Multiword DMA transfer cycle time (120ns)

0078H

SEAGATE 600 SSD PRODUCT MANUAL, REV. A

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Seagate ST480HM000, ST120HM001, ST120HM000, ST240HM001, ST240HM000, ST480HM001 manual Identify Device command, 3FFFH