Identify Drive Command - Seagate ST9655 Series Product Manual

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The following commands are specific to the ST9655 family drives or
contain drive-specific features.

3.3.1 Identify Drive command

The Identify Drive command (command code EC
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
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 ST9655
family drives.
Word Description
Configuration information:
Bit 10: disc transfer > 10
Mbits/sec
Bit 6: fixed drive
0
Bit 4: head switch time >
15 µsec
Bit 3: not MFM encoded
Bit 1: hard sectored disc
Number of fixed cylinders
1
(default logical emulation)
2 ATA reserved
3 Number of heads (default)
Number of unformatted
4
bytes per track
Number of unformatted
5
bytes per sector
Number of sectors per
6 track
(default logical emulation)
7–9 ATA reserved
Serial Number:
10–19 (20 ASCII characters,
0000 = none)
H
ST9655 Family Product Manual, Rev. A
) transfers information
H
ST9655AG ST9550AG
045A 045A
H H
03F8 03AE
H H
0000 0000
H H
0010 0010
H H
8D90 8D90
H H
0248 0248
H H
003F 003B
H H
0000 0000
H H
ASCII ASCII
ST9385AG
045A
H
003A6
H
0000
H
000E
H
8D90
H
0248
H
0033
H
0000
H
ASCII