Logical Formatting

After you partition the disk to create logical volumes, the next step is to format each volume, which creates the filesystem structure that will organize the data stored on that volume. This logical format writes information to disk that is needed by the filesystem, including:

  • A partition boot sector for the filesystem that occupies that partition. Don’t confuse the partition boot sector with the MBR. Information contained in the MBR applies to the entire physical disk drive, while information contained in the partition boot sector applies only to the partition to which it is written.

  • The System ID Byte, which identifies the partition type and the filesystem used to format it.

  • Bad-sector mapping information.

  • Various information specific to the filesystem, including disk-free and disk-used data and the location of files and folders within the partition.

In the DOS/Windows 9X environment, the filesystem you create will be one of the following.

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