Identify Device Command - Seagate ST9750423AS 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 the table on page 27. 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 2.0 on page 4 for default parameter
settings.
The following commands contain drive-specific features that may not be included in the Serial ATA specification.
W D
ORD ESCRIPTION
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 multi-
ple (16)
48 Reserved
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
M P M
OMENTUS RODUCT ANUAL
) transfers information about the drive to the host following power up. The data is
H
= none)
H
, R . F
EV
V
ALUE
0C5A
H
16,383
C837
H
16
0000
H
0000
H
003F
H
0000
H
ASCII
8000
H
0004
H
0000
H
x.xx
ST9750423AS
ST9750423ASG
ST9750422AS
ST9750420AS
ST9750420ASG
ST9640424AS
ST9640423AS
ST9640423ASG
ST9500424AS
ST9500423AS
ST9500423ASG
8010
H
0000
H
2F00
H
4000
H
0200
H
0200
H
0007
H
xxxx
H
xxxx
H
25