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13 FFD 2.5" and 3.5" IDE Plus Flash Disk User Manual 48-SR-003-03-7L Rev 2.1
7 DRIVE PARAMETERS
Most IDE device drivers can automatically detect the total number of sectors in the IDE Plus,
using the IDENTIFY DRIVE command, and configure them accordingly. However, some older
device drivers need to obtain the drive geometry parameters manually. The physical drive
parameters are just a convention and have no effect on the way data is stored within the
IDE Plus.
Table 1: Drive Parameters
Unformatted
Disk Capacity
(MB)
Total Number of
User-Addressable
Sectors in LBA
Mode
(Words 60/61 of
IDENTIFY information)
Number of
Logical Sectors
per Track
(Words 6 and 56
after power-on of
IDENTIFY
information)
Number of
Logical Heads
(Words 3 and 55
after power-on of
IDENTIFY
information)
Number of
Logical Cylinders
(Words 1 and 54 after
power-on) of IDENTIFY
information)
Current CHS
Capacity
(Sectors)
(Words 57/58 after
power-on of
IDENTIFY
information)
256 499456 63 16 495 498960
512 1002752 63 16 994 1001952
1024 2009344 63 16 1993 2008944
2048 4011008 63 16 3979 4010832
3072 6035712 63 16 5987 6034896
4096 8037376 63 16 7973 8036784
5120 10062336 63 16 9982 10061856
6144 12063744 63 16 11968 12063744
7168 14088960 63 16 13977 14088816
8192 16090112 63 16 15962 16089696
9216 18115328 63 16 16383 16514064
10240 20116480 63 16 16383 16514064
12288 24142848 63 16 16383 16514064
14336 28170240 63 16 16383 16514064
16384 32196608 63 16 16383 16514064
18432 36222976 63 16 16383 16514064
20480 40249344 63 16 16383 16514064
22528 44275712 63 16 16383 16514064
24576 48302080 63 16 16383 16514064
26624 52329472 63 16 16383 16514064
28672 56355840 63 16 16383 16514064
30720 60382208 63 16 16383 16514064
32768 64408576 63 16 16383 16514064