Medalist 10240, 7630, 5120, 2510 Product Manual, Rev. B
25
The following commands contain drive-specific features that may not be
described in the
Draft ATA-4 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, 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 drive
specifications in Section 1 of this manual for default parameter settings.
Note. If the alternate capacity jumper is installed on these drives, the
drive capacity is reduced in word 1 to 4,092 cylinders.
Word
Description
Value
0
Configuration information:
•
Bit 15: 0 = ATA; 1 = ATAPI
•
Bit 7: removable media
•
Bit 6: removable controller
•
Bit 0: reserved
0C5A
H
1
Number of logical cylinders:
16,383 (ST310240A)
15,878
(ST37630A)
10,585
(ST35120A)
4,956
(ST32510A)
3FFF
H
(ST310240A)
3E06
H
(ST37630A)
2959
H
(ST35120A)
135C
H
(ST32510A)
2
ATA-reserved
0000
H
3
Number of logical heads:
16
(ST310240A, ST32510A)
15
(ST37630A, ST35120A)
0010
H
(ST310240A)
(ST32510A)
000F
H
(ST37630A)
(ST35120A)
4
Retired
0000
H
5
Retired
0000
H
6
Number of logical sectors per logical
track: 63
003F
H
7–9
Retired
0000
H
