Seagate ST3250824ACE ユーザーズマニュアル
DB35 Series 7200.2 Product Manual, Rev. C
33
4.1.2
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 6
on page 30. 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 3 for default parameter settings.
on page 30. 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 3 for default parameter settings.
The following commands contain drive-specific features that may not be included in the Draft ATA-7 Standard.
Word
Description
Value
0
Configuration information:
• Bit 15: 0 = ATA; 1 = ATAPI
• Bit 7: removable media
• Bit 6: removable controller
• Bit 0: reserved
• 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
ATA-reserved
0000
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
0000
H
21
Retired
0400
H
22
Obsolete
0000
H
23–26
Firmware revision (8 ASCII character string, padded with blanks to
end of string)
end of string)
x.xx
27–46
Drive model number
(40 ASCII characters, padded with blanks to end of string)
(40 ASCII characters, padded with blanks to end of string)
ST3500841ACE
ST3400833ACE
ST3300822ACE
ST3250824ACE
ST3200827ACE
ST3160212ACE
ST3120213ACE
ST3802110ACE
ST3400833ACE
ST3300822ACE
ST3250824ACE
ST3200827ACE
ST3160212ACE
ST3120213ACE
ST3802110ACE
47
(Bits 7–0) Maximum sectors per interrupt on Read multiple and Write
multiple (16)
multiple (16)
8010
H
48
Reserved
0000
H
49
Standard Standby timer, IORDY supported and may be disabled
2F00
H
50
ATA-reserved
0000
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
54
Number of current logical cylinders
xxxx
H
55
Number of current logical heads
xxxx
H