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6
ST9144 Family Installation Guide, Rev. B
Note that the final drive capacity shown by the CMOS and total
sectors cannot exceed the values indicated in the last column of
the following table as defined by the following equation:
(Sectors) (Heads) (Cylinders)
If your BIOS offers a "custom drive" or a "user-defined" drive type,
you may use one of the configurations listed below.
MBytes
CMOS
Model
(F)
MBytes (F)
ST9051A 42.86
40.87
ST9051A 42.82
40.84
ST9052A 42.65
40.67
ST9077A 64.05
61.09
ST9096A 85.29
81.34
ST9144A 127.94
122.02
The CMOS calculation of drive capacity is based on a variation
of the number of bits in a megabyte, for purposes related to drive
addressing.
When the drive geometry has been entered into the "user-de-
fined" or "custom" drive type, the CMOS may display the calcu-
lated drive capacity. This number should correspond with the
capacity listed in the "CMOS MBytes (F)" column of the table.
Note that the drive provides the user with full capacity as specified
in the "Mbytes (F)" column of the table.
After the high-level formatting has been completed, the drive
capacity can be verified using the DOS CHKDSK utility.
Total Sectors per Drive
Total
R/W
Sect./
Cyl.
Sect. /
Heads
Track
Drive
654
4
32
83,712
820
6
17
83,640
980
5
17
83,300
802
4
39
125,112
980
10
17
166,600
980
15
17
249,900
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