Seagate Barracuda 7200.7 ST3120025A, Product Manual

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U Series 9 Product Manual, Rev. C 29
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 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 3 for default parameter settings.
The following commands contain drive-specific features that may not be
included in the Draft ATA-6 Standard.
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 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) x.xx
27–46 Drive model number: (40 ASCII charac-
ters, padded with blanks to end of string) ST3160022A
ST3120025A
ST380012A