Seagate ST9640423AS ユーザーズマニュアル

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Momentus Product Manual, Rev. C
5.3.1
Identify Device command
The Identify Device command (command code EC
H
) transfers information about the drive to the host following 
power up. The data is 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 3.0 on page 4 for default parameter settings.
The following commands contain drive-specific features that may not be included in the Serial ATA specifica-
tion.
Word
Description
Value
 
 
0
Configuration information:
 
• Bit 15: 0 = ATA; 1 = ATAPI
 
• Bit 7: removable media
 
• Bit 6: removable controller
 
• Bit 0: reserved
0C5A
H
1
Number of logical cylinders
16,383
2
Specific configuration
C837
H
3
Number of logical heads
16
4
Retired
0000
H
5
Retired
0000
H
6
Number of logical sectors per logical track: 63
003F
H
7–9
Retired
0000
H
10–19
Serial number: (20 ASCII characters, 0000
H
 = none)
ASCII
20
Retired
8000
H
21
Retired
0004
H
22
Obsolete
0000
H
23–26
Firmware revision (8 ASCII character string, padded with 
blanks to end of string)
x.xx
27–46
Drive model number: (40 ASCII characters, padded with 
blanks to end of string)
ST9750423AS
 
ST9750423ASG
 
ST9750422AS
 
ST9750420AS
 
ST9750420ASG
 
ST9640424AS
 
ST9640423AS
 
ST9640423ASG
 
ST9500424AS
 
ST9500423AS
 
ST9500423ASG
47
(Bits 7–0) Maximum sectors per interrupt on Read multiple 
and Write multiple (16)
8010
H
48
Reserved
0000
H
49
Standard Standby timer, IORDY supported and may be dis-
abled
2F00
H
50
Capabilities
4000
H
51
PIO data-transfer cycle timing mode
0200
H
52
Retired
0200
H
53
Words 54–58, 64–70 and 88 are valid
0007
H