Identify Device Command - Seagate ST1.2 - Series 8 GB Removable Hard Drive Product Manual

4.1.3

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 31. 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 ATA specification
Configuration information:
• Bit 15: 0 = ATA; 1 =
ATAPI
0 • Bit 7: removable media
• Bit 6: removable control-
ler
• Bit 0: reserved
1 Obsolete
2 Special Config
3 Obsolete
4 Retired
5 Retired
6 Obsolete
7 Reserved for CF Spec
8 Reserved for CF Spec
9 Retired
Serial number:
10–19 (20 ASCII characters,
0000 = none)
H
20 Retired
21 Retired
22 Obsolete
Firmware revision
(8 ASCII character string,
23–26
padded with blanks to end
of string)
Drive model number:
(40 ASCII characters,
27–46
padded with blanks to end
of string)
ST1.2 Series Product Manual, Rev. B
) transfers information about the drive to the host following
H
CF specification
General Config
Default number of
cylinders
Reserved
Default number of heads
Number of unformatted
bytes/track (Obsolete)
Number of unformatted
bytes/sector (Obsolete)
Default number of
sectors/track
Number of sectors per
card (MSW)
Number of sectors per
card (LSW)
Obsolete
Serial number:
(Right justified)
Obsolete
Obsolete
Number of ECC bytes
Firmware revision
Drive model number (left
justified) big endian byte
order in word
Value Value
CF Mem/IO CF TruIDE
848A 848A
H H
16,383 16,383
0000 0000
H H
16 16
0000 0000
H H
0000 0000
H H
003F 003F
H H
xxxx xxxx xxxx xxxx
H H
0000 0000
H H
ASCII ASCII
0000 0000
H H
0000 0000
H H
0004 0004
H H
x.xx x.xx
ST68022CF ST68022CF
ST66022CF ST66022CF
ST64022CF ST64022CF
Value
FX (Flex)
0C5A
H
16,383
0000
H
16
0000
H
0000
H
003F
H
xxxx xxxx
H
0000
H
ASCII
0000
H
0000
H
0004
H
x.xx
ST68022FX
ST66022FX
ST64022FX
31