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Marathon 810 (ST9816AG) Product Manual, August 1995
The following commands contain drive-specific features or are not de-
scribed in the Draft Proposed ATA-2 Standard.
3.2.2 Identify Drive command
The Identify Drive command (command code EC
about the drive to the host after power up. The data is organized as a
single 512-byte block of data, whose contents 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 ST9816AG.
Word
Configuration information:
Bit 10: disc transfer
Bit 6: fixed drive
0
Bit 4: head switch time > 15 sec
Bit 3: not MFM encoded
Bit 1: hard-sectored disc
Number of fixed cylinders
1
(default logical emulation): 1,571
2
ATA reserved
3
Number of heads (default logical emulation): 16
4
Number of unformatted bytes per track (36,240)
5
Number of unformatted bytes per sector (584)
Number of sectors per track
6
(default logical emulation): 63
7–9
ATA reserved
Serial Number:
10–19
(20 ASCII characters, 0000
Controller type (dual-port multisector buffer
20
with caching)
21
Buffer size (240 sectors of 512 bytes each)
22
Number of ECC bytes available (16)
Firmware revision (8 ASCII character string):
23–26
xx = ROM version, ss = RAM version, tt = RAM
version
) transfers information
H
Description
10 Mbits/sec
= none)
H
25
ST9816AG
045A
H
0623
H
0000
H
0010
H
8D90
H
248
H
003F
H
0000
H
ASCII
0003
H
00F0
H
0010
H
xx.ss.tt
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