When the dual-system of fedora is installed in win7, there is insufficient partition space, but there is still more than 100 Gb. Why?

First of all, the first few digits are not mentioned here. Fedora has its own partition format, which has nothing to do with FAT32 or NTFS.
Problem Analysis:
You need to create your own primary partition when installing fedora for partitioning, because the number of disks (primary partition + extended partition) on the same disk cannot exceed 4, that is, there is a limit on the quantity. If the number of partitions in your win7 System (primary partition + extended partition) exceeds two, fedora cannot create the primary partition on this hard disk, therefore, the fedora partition selection interface prompts insufficient space.

Solution:
Make sure that the partition where your system is located in win7 is the primary partition (generally the C disk), and other partitions (generally other partitions except the C disk) belong to the same extended partition, make sure that there is only one primary partition in the hard disk before fedora is installed, and one extended partition exists. In this way, you will not report the error of insufficient space when installing fedora.

From:

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