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Serial ATA Interface

Table 6 Supported ATA commands (Continued)

 

 

Command name

Command code (in hex)

 

 

Write Sectors Extended

34H

Write Uncorrectable

45H

4.3.1 Identify 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 on page 30. 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.

The following commands contain drive-specific features that may not be included in the Serial ATA specification.

Table 7 Identify Device commands

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:

ST2000DL003

 

(40 ASCII characters, padded with blanks to end of string)

ST1500DL003

 

 

 

 

 

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

4000H

 

 

 

51

PIO data-transfer cycle timing mode

0200H

 

 

 

Barracuda Green SATA Product Manual, Rev. D

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Seagate ST1500DL003, ST2000DL003 manual Identify Device command, Word Description Value, 0C5AH, Ascii