If I choose the ‘Erase Disk’ option, which I assume means a full format of the target device and an automated partitioning, what will it default to? My needs are simple: no swap partition or separate /home, root+home can be ext4 since I have no interest in configuring snapshots at the moment. Must I choose the manual partitioning option to achieve all of that?
The install would be done in UEFI mode, but that probably won’t matter with the automated option.
It will be a UEFI partition and a single partition for /
Edit: Nevermind, disregard 
No it does. If you don’t want UEFI, boot the ISO in BIOS/Legacy mode. Then it will do a non-UEFI install.
How the ISO is booted determines if you get a UEFI install or not.
Yes, I knew about the boot mode determining the type of install. But what did you mean with
In UEFI mode, it will create two partitions. An EFI partition and a partition for /.
Oh, you meant the boot partition? I haven’t really looked into legacy installs for any OS, for a while.
The EFI partition isn’t really a boot partition. I suppose it could be mounted at /boot but we don’t do that.
Ok, it will be a good idea for me to brush up on https://wiki.archlinux.org/title/EFI_system_partition some more.
And the default file system for / will be ext4?
There is a filesystem choosing box that pops up when you select Erase Disk. ext4 is the default.
It’s good that you’re given the chance to customize those two even if you choose the auto-partitioning option, not all distros have that in their Calamares. Thank you both.
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