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.This has some consequences for LILO and similar boot loaders. (2) It is necessary for all operating systems that use one disk to agree on where the partitions are.In other words, if you use both Linux and, say, DOS on one disk, then both must interpret the part....

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