You can have 1 password and 50 LUKS drives if you want.
You don’t have to use LVM at all.
I have 65 guests on my PC at the moment.
Bu having normal partitioning I do keep my guests backed up regularly so I won’t ever lose everything.
I even have a backup clone of my drive every week along side the daily backups of my work machines.
I’m only running a 500 GB drive at the moment though unfortunately.
I don’t use EFI either, I stick to standard.
I have reinstalled this machine about 40 times recently after doing stupid things with Qubes tryign to update it and the qubes updates breakign the isntallation.
as I have my guests on a separate drive, all I do is reinstall qubes on another drive, then go to my alternate 500 GB paired drive, create the guests on there, then copy across the images, and done, I’m up and running within 2 hours.
If I had NVME drives instead of slow SATA I’d have then set up as mirrored.
I would tell you to go normal partioning instead of LVM.
keep the boot and root system on one drive. Don’t really worry about a USB unless you need it for booting security.
And then you would have the boot, efi and root filesystem on that USB.
I would tell you just set up the 2TB as mirrored. Faster reads.
But since it’s NVME, depending on the generation and drive speeds you may not need to.
They can just be configured as a JBOD in the BIOS, then in Qubes installation, set up the JBOD as one partition mounted at “/var/lib/qubes”
for the 512 set it up as /boot 512M , EFI 1GB, / (remainder) You can always set up as / (64GB), /home (remainder)
if you want the home directory to be separate.
Do the same thing on the usb is you want to use the usb instead.
As for the backups, I have backups, and I don’t use the qubes built-in backup system, I just copy off my image files.
I rarely take a backup of my qubes (os) drive because I jsut run the installer as I think it’s faster (since I have SATA). You can have multiple pools for the systems as well. You could set one up for /var/lib/qubes and one for /qubesvms/ and have guests set up in both. there isn’t any real restriction on it.
I have a full qubes install on one of my USBs that I can run properly, not very fast, but allows me to do most things when on the run, as long as it’s on USB3, since it is slow. But without running guests, if it’s just the operating system, it runs fast enough on USB 3 with the guests on the local drive(s).
So there are many ways to do things, it’s all a matter of how you want to work it.
I don’t use LUKS because I run SATA, and since I generally have 20-30 guests running at most times, the SATA gets a bit hot and heavy.
With your NVME, you should be fine to have it with LUKS.
But if using LUKS, make sure you back up enoguh, as if it doesn’t encrypt properly and the power goes out before writing finishes, you lose it all…
I can help with a lot regarding installation and setup if you need further assistance.