Aaeon Gene-6320 Manual page 50

Here is a brief explanation of drive specifications:
Capacity:
Disk drive capacity (approximate). Note that this size is
usually slightly greater than the size of a formatted disk given by a
disk-checking program.
Cylinder:
Number of cylinders.
Head:
Number of heads.
Precomp:
Write precompensation cylinder .
Landz:
Landing zone.
Sector:
Number of sectors.
Drive A
Drive B
Select the correct specifications for the diskette drive(s) installed in
the computer.
None
360K, 5.25 in
1.2M, 5.25 in
720K, 3.5 in
1.44M, 3.5 in
2.88M, 3.5 in
No diskette drive installed
5-1/4 inch PC-type standard drive;
360 kilobyte capacity
5-1/4 inch AT-type high-density
drive; 1.2 megabyte capacity
3-1/2 inch double-sided drive;
720 kilobyte capacity
3-1/2 inch double-sided drive;
1.44 mega byte capacity
3-1/2 inch double-sided drive;
2.88 mega byte capacity
Chapter 3 Award BIOS Setup 41