User Manual
Seagate BarraCuda Product Manual, Rev. H 24
www.seagate.com
4.3.1 Identify Device command
The Identify Device command (command code EC
H
) 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 “Supported ATA commands” 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.
The following commands contain drive-specific features that may not be included in the SATA specification.
Table 9 Identify Device commands
Word Description Value
0
Configuration information:
• Bit 15: 0 = ATA; 1 = ATAPI
• Bit 7: removable media
• Bit 6: removable controller
• Bit 0: reserved
0C5A
H
1 Number of logical cylinders 16,383
2
Specific configuration:
37C8h Device requires SET FEATURES subcommand to spin-up after power-up
and IDENTIFY DEVICE data is incomplete.
738Ch Device requires SET FEATURES subcommand to spin-up after power-up
and IDENTIFY DEVICE data is complete.
8C73h Device does not require SET FEATURES subcommand to spin-up after
power-up and IDENTIFY DEVICE data is incomplete.
C837h Device does not require SET FEATURES subcommand to spin-up after
power-up and IDENTIFY DEVICE data is complete.
C837
H
3 Number of logical heads 16
4 Retired 0000
H
5 Retired 0000
H
6 Number of logical sectors per logical track: 63 003F
H
7–9 Retired 0000
H
10–19 Serial number: (20 ASCII characters, 0000
H
= none) ASCII
20 Retired 0000
H
21 Retired 0400
H
22 Obsolete 0000
H
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)
47 (Bits 7–0) Maximum sectors per interrupt on Read multiple and Write multiple (16) 8010
H
48
Trusted Computing feature set options:
15 Shall be cleared to zero
14 Shall be set to one
13:1 Reserved for the Trusted Computing Group
0 Trusted Computing feature set is supported
4000
H
49 Standard Standby timer, IORDY supported and may be disabled 2F00
H