FS type bcachefs is Unknown

[kezyr]

FS type bcachefs is Unknown

[codefiles]

Bcachefs isn't something parted supports which is being used for partitioning under the hood.

That is not accurate for two reasons:

1. The user is attempting an install with a pre-mounted configuration and therefore has already partitioned and formatted.
2. parted(8) states that providing a file system when creating a partition is optional. This is true of pyparted as well, give it a try.

I will submit a pull request to fix this since it should work.

[svartkanin]

Bcachefs isn't something parted supports which is being used for partitioning under the hood.

[svartkanin]

Apologies I misread the issue, I thought it was for manual partitioning. In that case yes, pre-mounted should work and it's a bug.
However, the pre-mounted feature is in general somewhat limited still as it doesn't support many detections, btrfs and lvm being some of them.