Handle disk sector size

[vjr]

Addresses elementary/installer#620

Required by elementary/installer#621

[13r0ck]

Tested and there are no regressions in 20.04 nor 21.04 nor 21.10.

I was unable to reproduce the issue like @vjr did here, I couldn't figure out how to make a virtual disk with a sector size of 4096. Anyway, no new issues in this PR.

[leviport]

Approved per Brock's testing

[vjr]

Folks, thanks for reviewing this PR. If you would, please go ahead and merge and I'll move the elementary PR out of draft state.

I can post the qemu commands and options that I am using to reproduce and test later today when I'm back at my computer.

Just FYI I'm less than a novice at Rust and have been trying to more fully fix 4k sector support and will open a new draft PR for your comments if I can make progress, or if one of you would more easily accomplish this and be able to test in qemu that would be great too.

Thanks!

[vjr]

Here is the command I used to launch the elementary OS live ISO and test the installer, after creating a raw format qemu disk image with qemu-img create -f raw odin.raw 20G :

qemu-system-x86_64 -machine q35,accel=kvm -m 16384 -smp 8 -cpu host -boot d -cdrom /home/vishal/Downloads/elementaryos-6.0-stable.20211005.iso -drive file=/home/vishal/Documents/QEMU/odin.raw,format=raw,id=odin,if=none -device virtio-scsi,id=scsi -device scsi-hd,bus=scsi.0,drive=odin,logical_block_size=4096,physical_block_size=4096 -bios /usr/share/qemu/OVMF.fd

I just installed the gnome-boxes deb package from the ubuntu archives which got me the required QEMU, KVM and OVMF bits.

After running the installer IIRC I just changed the -boot d option to -boot c to reboot into the installed system to see if it really worked.

Of course, you could modify the qemu command params based on the docs for your own testing of distinst in case you're doing it with a PopOS build.

[AKmatiAK]

Doesn't work on 22.04 installer, partition sizes are calculated 8 times smaller on my 4Kn drive