Seagate ST4000VM000 manual Identify Device command, Word Description Value

www.seagate.com	Serial ATA Interface
Table 7 Supported ATA commands (continued)
Command name	Command code (in hex)
Write Multiple	C5H
Write Multiple Extended	39H
Write Multiple FUA Extended	CEH
Write Sectors	30H
Write Sectors Without Retries	31H
Write Sectors Extended	34H
Write Stream DMA Extended	3AH
Write Stream Extended	3BH
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 4096-byte block of data, whose contents are shown 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 8 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	C837H
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	0000H
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 to end of string)

Video 3.5 HDD Product Manual, Rev. H 33