Identify Device Command - Seagate ST500VT001 Product Manual

4.3.1

Identify Device command

The Identify Device command (command code EC
organized as a single 512-byte block of data, whose contents are shown in
Parameters listed with an "x" are drive-specific or vary with the state of the drive. Refer to
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
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 Specific configuration
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 Trusted Computing Feature set options
49 Standard Standby timer, IORDY supported and may be disabled
50 Capabilities
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 Multiple command
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) transfers information about the drive to the host following power up. The data is
H
= none)
H
M , R . A
RODUCT ANUAL EV
S
ERIAL
10. All reserved bits or words should be set to zero.
Table
Drive Specifications
Value
0C5A
H
16,383
C837H
16
0000
H
0000
H
003F
H
0000
H
ASCII
0000
H
8000
H
0004
H
x.xx
ST500VT000
ST500VT001
ST320VT000
ST250VT000
8010
H
0000
H
2F00
H
4000
H
0200
H
0200
H
0007
H
xxxx
H
xxxx
H
xxxx
H
xxxx
H
xxxx
H
ATA (SATA) I
NTERFACE
on page 3
for default
20