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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) Total Sectors per Drive

If your BIOS offers a “custom drive” or a “user-defined” drive type, you may use one of the configurations listed below.

 

MBytes

CMOS

 

R/W

Sect./

Total

Model

Cyl.

Sect. /

(F)

MBytes (F)

Heads

Track

 

 

 

 

 

 

Drive

 

 

 

 

 

 

 

ST9051A

42.86

40.87

654

4

32

83,712

ST9051A

42.82

40.84

820

6

17

83,640

ST9052A

42.65

40.67

980

5

17

83,300

ST9077A

64.05

61.09

802

4

39

125,112

ST9096A

85.29

81.34

980

10

17

166,600

ST9144A

127.94

122.02

980

15

17

249,900

 

 

 

 

 

 

 

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.

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Seagate ST9144 manual Sectors×Heads×Cylinders ≤ Total Sectors per Drive, Sect Total Model Cyl MBytes F Heads