Identify Device Command - Seagate ST3100011A - 100GB UDMA/100 7200RPM 2MB IDE Hard Drive Product Manual

4.1.2

Identify Device command

The Identify Device command (command code EC
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
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 ATA-reserved
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 Reserved
49 Standard Standby timer, IORDY supported and may be disabled
50 ATA-reserved
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
Barracuda 7200.7 Product Manual, Rev. N
) transfers information about the drive to the host following
H
= none)
H
Value
0C5A
H
16,383
0000
H
16
0000
H
0000
H
003F
H
0000
H
ASCII
0000
H
0400
H
0000
H
x.xx
ST3200822A
ST3200021A
ST3160023A
ST3160021A
ST3120026A
ST3120022A
ST380013A
ST380011A
ST340014A
8010
H
0000
H
2F00
H
0000
H
0200
H
0200
H
0007
H
xxxx
H
29