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From: =?UTF-8?Q?Jorge_Mart=C3=ADnez_L=C3=B3pez?= <jorgeml@gmail.com>
Date: Sun, 11 Mar 2012 13:16:54 +0100
Message-ID: <CAMgZwF3aHqhqgJZKV6eBWEfLP83mPKS4nPAuLQGJ-mERyAMn=Q@mail.gmail.com>
Subject: Re: [gentoo-user] LVM, /usr and really really bad thoughts.
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Hi!
I had some struggle with a separate /usr on top of LVM and the dracut
thing. I noticed that udev was complaining at boot that it could not
find some scripts.
The usmount dracut module did not work for me because it could not
find /usr. So what I did was to include the fstab-sys smodule in
dracut:
/etc/dracut.conf
# Dracut modules to omit
omit_dracutmodules+=3D"usrmount"
# Dracut modules to add to the default
add_dracutmodules+=3D"fstab-sys"
Then I created /etc/fstab.sys with just the /usr partition
/dev/disk/by-uuid/90d82b02-e6c2-4011-940e-783d12b0c4fe /usr ext4 noatime=
1 2
Dracut could only find the partition by using the uuid (use blkid to
find it easily).
The next step was to remove /usr from /etc/fstab to prevent /usr from
being mounted twice (the boot process does not like it).
The last obstacle is /etc/mtab. By the time /usr is mounted I believe
/ is mounted as read only, so mount cannot update /etc/mtab. The
trivial solutions is to delete /etc/mtab and make it a symlink to
/proc/mounts . In that case it is always up to date.
Of course, YMMV. Be careful when changing things that can prevent your
machine from booting and make sure you have a live CD at hand.
Cheers,
--=20
Jorge Mart=C3=ADnez L=C3=B3pez <jorgeml@gmail.com> http://www.jorgeml.net
=C2=A0 =C2=A0 =C2=A0 Google Talk / XMPP: jorgeml@gmail.com