Other partitions on the installer disk cannot be selected for installation

[hacker1024]

Describe the bug The installer doesn't show disks that contain the installation environment.

I copied the contents of the installation ISO to a small partition on my SSD, and booted from it. I'd like to install Elementary on a large partition on the same drive. At the moment, this is impossible as the drive is hidden in the installer.

To Reproduce Steps to reproduce the behavior:

1. Copy the contents of the installation ISO to a partition on a disk
2. Give the partition an ESP GUID, or use either efibootmgr or a bootloader to launch the installation environment
3. Launch the installer and select the custom install option
4. Observe the lack of the disk in the partitioning screen

Expected behavior I expect all partitions other than the /cdrom partition to display on the partitioning screen.

Screenshots

Desktop (please complete the following information):

• OS: Pop!_OS 21.04
• Browser: Firefox Developer Edition
• Version: 90

Additional context

[hacker1024]

Friendly bump as Odin is now released

[hacker1024]

It'd be great if this could be fixed in 7

[hacker1024]

@elementary?