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SEAGATE LAPTOP ULTRATHIN HDD SATA PRODUCT MANUAL, REV. C 19
SERIAL ATA (SATA) INTERFACE
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 the table below. 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. Refer to Drive Specifications
on page 4 for default
parameter settings.
The following commands contain drive-specific features that may not be included in the Serial ATA specification.
Standby Immediate E0h
ATA-standard security commands
Security Set Password F1h
Security Unlock F2h
Security Erase Prepare F3h
Security Erase Unit F4h
Security Freeze Lock F5h
Security Disable Password F6h
Table 7 Identify Device command
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 C837H
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 8000
H
22 Obsolete 0004
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)
ST500LT032
ST500LT033
ST320LT030
ST320LT031
47 (Bits 7–0)
Maximum sectors per interrupt on Read multiple and Write multiple (16)
8010
H
48 Trusted Computing Feature set options 0000
H
49 Standard Standby timer, IORDY supported and may be disabled 2F00
H
50 Capabilities 4000
H
Table 6 Supported ATA commands
ATA-standard commands names Command code (in hex)