Identify Device Command - Seagate ST5000AS0011 Product Manual

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5.3.1 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 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 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
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)
(Bits 7–0) Maximum sectors per interrupt on Read multiple
47
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
56 Number of current logical sectors per logical track
57–58 Current capacity in sectors
Seagate Archive HDD Product Manual, Rev. D
) transfers information about the drive to the host following
H
= none)
H
Value
0C5A
H
16,383
0000
H
16
0000
H
0000
H
003F
H
0000
H
ASCII
0000
H
0400
H
0000
H
x.xx
8010
H
0000
H
2F00
H
0000
H
0200
H
0200
H
0007
H
xxxx
H
xxxx
H
xxxx
H
xxxx
H
23