On Sat, May 12, 2012 at 10:54 PM, <kwk...@hkbn.net> wrote: > On Sat, 12 May 2012 19:54:24 -0500 > Canek Peláez Valdés <can...@gmail.com> wrote: > >> On Sat, May 12, 2012 at 7:43 PM, Alex Schuster <wo...@wonkology.org> >> wrote: >> > Hi there! >> > >> > I'm using the new udev with a separate /usr partition. >> >> How do you create your initramfs? The new udev (>= 182, I believe) >> requires the use of an initramfs if you have a separated /usr. >> >> > It was encrypted, >> > and it seems there is no solution yet for this. >> >> dracut has two modules, crypt and crypt-gpg, that maybe do what you >> are needing. >> >> > so I moved it over to an >> > unencrypted volume - no problem, /usr is one partition where >> > encryption does not make that much sense anyway. Works, but after >> > an unclean shutdown (reading files in /proc/<pid>/ was not a good >> > idea) /usr wants to be fsck'ed. But it is already mounted at that >> > stage. >> >> That's the reason you need an initramfs. > > No, that's the reason you want the filesystem's fsck to be included in > the initramfs. > >> > The boot process just continues, but I wonder what one should do to >> > make the fsck run. Except for using a live cd. >> >> With an initramfs. > > Using initramfs is necessary but itself not sufficient. > > One can create an initramfs (from scratch) that does nothing but > mount /usr (with only busybox and a few /dev nodes, plus whatever other > tools needed to find /usr, viz. lvm, cryptsetup and friends, assuming > the necessary drivers are built in the kernel and not as modules --- > see e.g. the old gentoo wiki at > http://www.gentoo-wiki.info/HOWTO_Custom_Initramfs_From_Scratch ). > > The initramfs needs to have the relevant fsck tools (plus dependencies) > if it was to perform fsck.
Dracut (and I believe genkernel, but I don't use it, so I'm not sure) does all of that (and more, if so desired) for you. Regards. -- Canek Peláez Valdés Posgrado en Ciencia e Ingeniería de la Computación Universidad Nacional Autónoma de México
