QA:Testcase partitioning webui custom software RAID

Associated release criterion
This test case is associated with the Fedora_42_Beta_Release_Criteria#custom-partitioning release criterion. If you are doing release validation testing, a failure of this test case may be a breach of that release criterion. If so, please file a bug and nominate it as blocking the appropriate milestone, using the blocker bug nomination page.

Description

A complete installation using advanced custom partitioning (blivet-gui) and a software RAID device for the root (/) file system. For more details on RAID please consult [1].

Setup

1. Prepare a test system with two or more working, supported storage devices of sufficient size for a Fedora install, and a Fedora installation medium that uses the webui-based installer - e.g. Fedora Workstation live, on Fedora 42 and above.

How to test

1. Boot the webui-based installer using any available means, e.g. Fedora Workstation live on Fedora 42+.
2. Proceed to the installer's "Installation method" screen, making sensible choices.
3. Ensure the target devices you prepared are selected as the "Destination".
4. Click the 'kebab menu' (the three white dots in a vertical line) at the top-right corner, and click "Launch storage editor". Click "Launch storage editor" again to confirm.
5. On the Storage screen, delete all existing partitions (if any), using the kebab menu for each partition.
6. Create any necessary bootloader partitions (e.g. EFI System Partition for UEFI installs, BIOS Boot partition for BIOS installs onto a GPT disk, PReP boot partition for PowerPC installs).
7. Create an ext4 or xfs /boot partition.
8. Click the burger menu (blue button with three white horizontal lines) and click "Create MDRAID device". Name it whatever you like, or keep the default name. Set the RAID level to 1. Check both disks are selected, and click "Create".
9. Click the kebab menu next to the new RAID device, and click "Create partition table". Click "Initialize".
10. Click the kebab menu next to the "Free space" on the RAID device, and click "Create partition". Name it whatever you like, set the mount point to / and the type to EXT4. Ensure the size is large enough for a root partition.
11. Optionally, also create a /home partition in the RAID device.
12. Click "Return to installation".
13. Finish the installation, choosing all provided defaults.

Expected Results

1. The installer should successfully create and install to the RAID devices: unrelated failures should be reported but do not constitute a failure of this test case
2. After booting the installed system, inspection of /proc/mdstat should confirm that the partitions designated as RAID devices are in fact RAID devices