Essay Archive - All About Disk Geometry and The 1024 Cylinder Limit For Disks.
All About Disk Geometry and The 1024 Cylinder Limit For Disks.
1. The problem
Suppose you have a disk with more than 1024 cylinders. Suppose moreover that
you have an operating system that uses the BIOS. Then you have a problem,
because the usual INT13 BIOS interface to disk I/O uses a 10-bit field for the
cylinder on which the I/O is done, so that cylinders 1024 and past are
inaccessible.
Fortunately, Linux does not use the BIOS, so there is no problem.
Well, except for two things:
(1) When you boot your system, Linux isn't running yet and cannot save you from
BIOS problems....
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