On 2020-11-25, Neil Bothwick <n...@digimed.co.uk> wrote: > On Wed, 25 Nov 2020 08:53:02 +0000, Wols Lists wrote: > >> >>> I suspect not as GRUB will be reading the menu files and GRUB >> >>> doesn't read from LVM volumes. >> >> >> >> Then what does grub's "lvm" module do, and how does it read the >> >> distro's .cfg files from the LVM volumes in which the various distros >> >> are installed? > > That was my thinking, that the kernel/initramfs was reading the LVs but > Grant mentioned the lvm module for GRUB so I broke the habit of a > lifetime and read the man page :-O > > "GRUB 2 can read files directly from LVM and RAID devices."
That was certainly the behavior described by the examples documented by people who were using grub to boot multiple partitions by having a master copy of grub with a menu that would then boot selected distros installed within LVM volumes by having each of the master menu entries load a new "distro" .cfg file from that LVM volume (each of the LVM volume's .cfg file was maintained by the distro package manager). But that relys on the assumption that the distros all run compatible versions of Grub2. What I was wondering was whether normal chainloading would work (which wouldn't rely on that assumption). -- Grant
