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The following commands contain drive-specific features that may not be
described in the
Draft Proposed ATA-3 Standard
.
3.2.2 Identify Drive command
The Identify Drive 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, the contents of which are shown in the
table below. 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 1 of this manual for default parameter settings for the Marathon
2250 and the Marathon 1680.
Word Description Contents
0
Configuration information:
Bit 6: fixed drive
0040
H
1
Number of fixed cylinders (default logical
emulation): 4,360 (ST92255AG);
3,256 (ST91685AG)
1108
H
(ST92255AG)
0CB8
H
(ST91685AG)
2 ATA-reserved 0000
H
3
Number of heads (default logical emulation):
16
0010
H
4 ATA-obsolete 0000
H
5 ATA-obsolete 0000
H
6
Number of sectors per track
(default logical emulation): 63
003F
H
7–9 Not used by this drive 0000
H
10–19
Serial number:
(20 ASCII characters, 0000
H
= none)
ASCII
20 ATA-obsolete 0000
H
21 ATA-obsolete 0000
H
22 Number of ECC bytes available (16) 0010
H
23–26
Firmware revision (8 ASCII character string):
xx
= ROM version,
ss
= RAM version,
tt=
RAM version
xx.ss.tt
continued on following page
Marathon 2250 and Marathon 1680 Product Manual 29