Josselin Poiret <d...@jpoiret.xyz> writes:
> [[PGP Signed Part:Undecided]] > Hi Csepp, > > Csepp <raingl...@riseup.net> writes: > >> I'm trying to move my installation from /dev/sda to /dev/sdb, I created >> the file system and changed the bootloader config in my operating-system >> definition to point to /dev/sdb and the file-system to use the correct >> UUID (previously it was using a label). >> First I tried to simply reconfigure my running system and then taking a >> BTRFS snapshot and copying that over the /dev/sdb1, but that failed. > > Any reason you didn't try in the reverse order? This seems prone to error. Since reconfigure overwrites /dev/sdb, I don't see how reversing the order would fix things?? Maybe copying the file system over and *then* running init would make sense. >> The exact error was GRUB not being able to find a file system with a >> given UUID, which matched the UUID of /dev/sda1. This error happened >> before GRUB loaded any of its modules, so I was dropped into a rescue >> shell. >> I thought this might be related to subvolumes, maybe I originally used >> the wrong config and the updated config was written to a different >> subvolume and GRUB doesn't recognize the default subvolume ID option on >> the BTRFS partition. >> I think this is a fairly critical error. > > This is too fuzzy to be actionable, but if you manage to reproduce > reliably then I would gladly take a look at it. I tried reproducing it, it seems to happen every time, but I can try to create a more minimal test case. >> The error doesn't manifest when I run guix system init with the same >> config, so there is some (possibly un(der)documented) difference between >> guix system reconfigure and guix system init that makes the former rely >> on the state of the running system in a way that doesn't take into >> account the new configuration. > > I don't think there is, the biggest difference is that `guix system > init` will copy stuff into the target store and initialize the basic > directories for Guix, whereas reconfigure will just build everything in > the current store. > > Best, I mean, that's the theory, but either Guix or GRUB seems to get the incorrect UUID from *somewhere*.