Seagate manual 27

Momentus 7200.2 SATA Product Manual, Rev. E
27
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 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.
Security Erase Unit F4h
Security Freeze Lock F5h
Security Disable Password F6h
Word Description Value
0
Configuration information:
• Bit 15: 0 = ATA; 1 = ATAPI
• Bit 7: removable media
• Bit 6: removable controller
• Bit 0: reserved
0C5AH
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
blanks to end of string) x.xx
27–46 Drive model number: (40 ASCII characters, padded with
blanks to end of string) ST9200420ASG ST9200420AS
ST9160823ASG
ST9160823AS
ST9120823AS
ST9100821AS
ST980813ASG
ST980813AS
47 (Bits 7–0) Maximum sectors per interrupt on Read multiple
and Write multiple (16) 8010H
48 Reserved 0000H
49 Standard Standby timer, IORDY supported and may be dis-
abled 2F00H
50 ATA-reserved 0000H
Command name Command code (in hex)