Mikkel L. Ellertson wrote: >> I set up an LVM partitioning scheme on one computer, >> with /boot on /dev/sda3 outside LVM . >> But grub could not access / because LVM was not activated. >> This made me wonder: >> >> 1. Is there any way of asking grub to activate LVM >> (eg run "vchange -a y") before it looks for the / partition? >> >> 2. Is there any argument one could add to the kernel line >> to the same effect? >> >> In the end I deleted the LVM, and used ordinary partitions, >> so the question is purely academic. >> > With /boot on its own partition, Grub does not need to access the > root partition. This is good because Grub does not understand LVM. > The thing you have to remember when using a separate /boot partition > is that the paths that Grub uses do not start with /boot. You would > use something like: > > title Fedora (2.6.23.14-115.fc8) > root (hd0,2) > kernel /vmlinuz-2.6.23.14-115.fc8 ro > root=/dev/VolGroup00/LogVol00 rhgb quiet > initrd /initrd-2.6.23.14-115.fc8.img > > As far as Grub is concerned, your /boot directory is its root > directory. This is what the root (hd0,2) is telling Grub. My problem was that root=/dev/VolGroup00/... was not found, since LVM was not active at at that point. The boot started, but failed with "/dev/root not found". -- Timothy Murphy e-mail (<80k only): tim /at/ birdsnest.maths.tcd.ie tel: +353-86-2336090, +353-1-2842366 s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland
