How to convert Primary partition to Logical partition without formatting?

A basic MBR disk can have either up to four primary volumes, or up to three primary volumes plus an 'unlimited' number of logical volumes. You need to convert a primary volume to logical if you want to create a fifth volume on a disk that currently has four primary volumes.

To convert a primary volume to logical:

Launch Partition Magic Server, you'll see all partitions' type under "Flag" list.

Select the Primary partition and click "Convert Logical" feature on left "Partitions Operations" box.

After clicking OK, the Primary partition will be converted to Logical partition, click Apply to proceed.

Note:
1. Converting the boot volume or the system volume to logical volume is not available. Otherwise, the machine will likely become unbootable.
2. The size of the converted volume might be slightly different from that of the original primary volume, as some space might be required to store supplementary information.

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