Identify Device Command - Seagate Enterprise Capacity 2.5 HDD Constellation Product Manual

7.3.1

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 Table 6 on
page 34. 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. See Section 3.0 on page 5for default parameter settings.
The following commands contain drive-specific features that may not be included in the Serial ATA
specification.
Word Description
Configuration information:
• Bit 15: 0 = ATA; 1 = ATAPI
0 • 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
56 Number of current logical sectors per logical track
57–58 Current capacity in sectors
59 Number of sectors transferred during a Read Multiple or Write Multi-
ple command
Constellation.2 Serial ATA Product Manual, Rev. F
) 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
xxxx
H
37