Description of problem:

When performing a fresh install of Fedora 25 Alpha via netinst on top of Fedora 24 with a Btrfs file system (/ and /home subvolume), Anaconda will not let the Btrfs partition (or any subvolumes) be re-used.

Anaconda did let me set mount points, but then for / it failed saying that it must be formatted - but the format tick box was always greyed out. This makes sense as subvolumes cannot be formatted.

However, this means that one most delete and re-create the partition, rather than re-using an existing one.

I guess I expected that it would let me keep my existing partition table and just re-format the btrfs partition and re-set up subvolumes, rather than making me delete and re-create the partition.

Or better still, let me keep one of the subvolumes and just deleted and re-created to the other to achieve the same thing as formatting. The current state is somewhat inconvenient, especially when one /home as a subvolume (and means data must be manually restored).


How reproducible:
Always


Steps to Reproduce:
1. Install Fedora with btrfs with at least one subvolume (e.g. /home)
2. Attempt to re-install Fedora
3. Try to use the existing btrfs partitions (whether formatting or not)


Actual results:
Cannot re-use existing btrfs partitions, must delete and re-partition.


Expected results:
Let me re-use existing partition, and preferably let me keep existing data.