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SEAGATE LAPTOP THIN SSHD SATA PRODUCT MANUAL, REV. D 23
SERIAL ATA (SATA) INTERFACE
5.3.1 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 Table 10. 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.
Table 10 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 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 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)
ST500LM000
ST500LM001
ST500LM020
ST320LM002
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
51 PIO data-transfer cycle timing mode 0200
H
52 Retired 0200
H
53 Words 54–58, 64–70 and 88 are valid 0007
H
54 Number of current logical cylinders xxxx
H
55 Number of current logical heads xxxx
H
56 Number of current logical sectors per logical track xxxx
H
57–58 Current capacity in sectors xxxx
H
59
Number of sectors transferred during a
Read Multiple or Write Multiple command
xxxx
H
60–61
Total number of user-addressable sectors
This field contains a value that is one greater than the total number of
user-addressable sectors. The maximum value that shall be placed in this
field is 0FFFFFFFh. The 0FFFFFFFh value applies to all capacities over
137GB (see Section 2.1 for related information).
ST500LM000 = 0FFFFFFFh
ST500LM001 = 0FFFFFFFh
ST500LM020 = 0FFFFFFFh
ST320LM002 = 0FFFFFFFh