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All About Partitioning

Optional FDISK Functions

May 29, 1999
By David Risley

FDISK in DOS 5.0 or later is more powerful than most people know. There are several options available with the program that are undocumented in the DOS manuals. The bad news is that these commands are unavailable with Windows 95. Instead, you will have to purchase a third party program such as Norton Utilities.

The most useful, in my opinion, is the "/MBR" parameter. This parameter tells FDISK to rewrite the Master Partition boot sector based on the partitions present on the drive without damaging the partitions on the drive. This is very useful when recovering from a virus that infects the boot sector of the drive. Use it by typing "FDISK /MBR" at the A: prompt.

To back up the partition table onto a floppy diskette, type "MIRROR /PARTN". This uses the MIRROR program to copy the partition table into a file called PARTNSAV.FIL. This can then be stored on your system disk. To restore this partition info, type "UNFORMAT /PARTN".

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