Identify Device Command - Seagate BARRACUDA ST31000524AS Product Manual

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4.3.1 Identify Device command

The Identify Device command (command code EC
power up. The data is organized as a single 512-byte block of data, whose contents are shown in on page 32. 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 Serial ATA specification.
Word Description
0 Configuration information:
• Bit 15: 0 = ATA; 1 = ATAPI
• Bit 7: removable media
• Bit 6: removable controller
• Bit 0: reserved
1 Number of logical cylinders
2 ATA-reserved
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
23–26 Firmware revision
(8 ASCII character string, padded with blanks to end
of string)
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)
48 Reserved
49 Standard Standby timer, IORDY supported and may
be disabled
50 ATA-reserved
51 PIO data-transfer cycle timing mode
52 Retired
53 Words 54–58, 64–70 and 88 are valid
54 Number of current logical cylinders
55 Number of current logical heads
Barracuda SATA Product Manual, Rev. B
) transfers information about the drive to the host following
H
Value
0C5A
16,383
0000
16
0000
0000
003F
0000
= none) ASCII
H
0000
0400
0000
x.xx
8010
0000
2F00
0000
0200
0200
0007
xxxx
xxxx
Serial ATA (SATA) Interface
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
35