If you accidentally lose it by installing grub from another system, it's possible to boot from grub command line. Use the /dev/mapper name for the root partition on the linux line. Then you can either run grub-install or run efibootmgr and remove the offending bootloader. (Or maybe re-order the bootloaders - mine won't do that.)
]]>Honestly, logical partitions can be useful. You might be able to pull it off, using efi.
I can't seem to get a grub-pc / bios install to boot efi. I read lots on cfdisk and gdisk, can't seem to do it on GPT partitioning with encryption. I run into mdama errors and such. I have empty space at start of disk. Manage to get grub booting MBR style. Had a bios grub partition as well, but grub would error out because it was ext2 o.o. Only to get dumped into initframs / busybox. Might be my firmware limitations, but MBR always seems to work on DOS partitioning when dealing with encryption. I prefer gpt, however I guess I haven't figured out how to get a minimal iso booting on a gpt disk yet.
How I always found is to use the grub-efi-amd64 package. With a efi partition (Fat32) and the boot, esp flag. You can have multiple boots on multiple hard drives pointing to the one efi partition. With a single grub finding all the efi boot parameters. However, I have only ever done this with one encrypted system. The encrypted system will see all the others but the others will not see the encrypted system.
You can also end up with the encrypted system boot option disappearing if you accidentally install grub on anouther system and you must chroot in, use efibootmgr, or your bios to point it back at the encrypted systems efi.
To run 3 would be cool. I imagine, again sharing a single home would be a bit easier to manage then 3 fully encrypted systems all on one boot manager. If all one boot loader would also be pretty impressive.
]]>Consider how to partition the SSD for your 3 distros. Less is more. And if you want to have control you may use the manual partitioning. But you need to know or learn what you are doing.
rolfie
]]>The 120G SSD isn't very big. We are talking about a non UEFI computer, don't we? Instead of MBR partitioning, read about GPT and the advantages. Maybe not required on that SSD, but I would call it an option, nowadays I prefer GPT whenever possible.
My approach for an encrypted setup: separate /boot unencrypted, separate /home drive encrypted, with the installer generate a volume for encryption, inside that a physical volume for LVM, split that into swap and root. Works great since I think Etch/Lenny, when I started to learn about Linux.
rolfie
]]>Why do you want a triple boot system?
]]>I know that, in GParted, I can make an extended partition with as many logical partitions inside as I like.
But how do I do that in Devuan's installer (Again, in Expert Install) and make sure all the logical partitions are encrypted?
Thanks.
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