Identify Device Command - Seagate ST4000DM000 Product Manual

4.3.1 Identify Device command

The Identify Device command (command code EC
The data is organized as a single 512-byte block of data, whose contents are shown in on page 21. 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 7 Identify Device commands
Word Description
Configuration information:
• Bit 15: 0 = ATA; 1 = ATAPI
• Bit 7: removable media
0
• Bit 6: removable controller
• Bit 0: reserved
1 Number of logical cylinders
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.
3 Number of logical heads
4 Retired
5 Retired
6 Number of logical sectors per logical track: 63
7–9 Retired
10–19 Serial number: (20 ASCII characters, 0000
20 Retired
21 Retired
22 Obsolete
Firmware revision
23–26
(8 ASCII character string, padded with blanks to end of string)
Drive model number:
27–46
(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)
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
49 Standard Standby timer, IORDY supported and may be disabled
) transfers information about the drive to the host following power up.
H
= none)
H
Value
0C5A
H
16,383
C837
H
16
0000
H
0000
H
003F
H
0000
H
ASCII
0000
H
0400
H
0000
H
x.xx
8010
H
4000
H
2F00
H