From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <3EBD22B3.4090808@inode.at> From: Manfred Gschweidl MIME-Version: 1.0 Subject: Re: [linux-lvm] mount root filesystem on lvm References: <3EBBF411.6060405@inode.at> <3EBBFF45.4050006@inode.at> <1052511447.6321.22.camel@chtephan.cs.pocnet.net> In-Reply-To: <1052511447.6321.22.camel@chtephan.cs.pocnet.net> Content-Transfer-Encoding: 7bit Sender: linux-lvm-admin@sistina.com Errors-To: linux-lvm-admin@sistina.com Reply-To: linux-lvm@sistina.com List-Help: List-Post: List-Subscribe: , List-Unsubscribe: , List-Archive: Date: Sat May 10 11:02:02 2003 List-Id: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: Christophe Saout Cc: linux-lvm@sistina.com hello, thanks for your response. ;-) i have one more question: what does your "lilo.conf" look like??? especially the "root=...." parameter ist he most interesting one. how does it need to be named with device-mapper??? thanks for any reply again, manfred Christophe Saout wrote: > Am Fre, 2003-05-09 um 21.19 schrieb Manfred Gschweidl: > > >>was anyone successfull with booting the root-filesystem on am lvm-volume >>with lvm2 and device-mapper interface, using an initial ramdisk?? >> >>can anyone point me in the right direction?? > > > I built my own ramdisk for that purpose (loosely based on the old LVM1 > ramdisk). It's contains the following files: > > -rwxr-xr-x 1 root root 442740 Dec 13 00:48 bin/bash > -rwxr-xr-x 1 root root 17196 Nov 7 2002 bin/mknod > -rwsr-xr-x 1 root root 60896 Jan 20 2002 bin/mount > -rwxr-xr-x 1 root root 46692 Nov 7 2002 bin/sed > -rwxr-xr-x 1 root root 4948 Dec 25 18:02 bin/true > -rwsr-xr-x 1 root root 27524 Jan 20 2002 bin/umount > -rw-r--r-- 1 root root 66 Jan 11 17:17 etc/fstab > -rw-r--r-- 1 root root 16932 Dec 12 23:36 etc/modprobe.conf > -rw-r--r-- 1 root root 24 Jan 11 17:17 etc/mtab > -rwxr-xr-x 1 root root 91790 Nov 7 2002 lib/ld-linux.so.2 > -rwxr-xr-x 1 root root 1193240 Nov 7 2002 lib/libc.so.6 > -rwxr-xr-x 1 root root 17300 Nov 7 2002 lib/libdevmapper.so.0.96 > -rwxr-xr-x 1 root root 9140 Nov 7 2002 lib/libdl.so.2 > -rwxr-xr-x 1 root root 23256 Dec 12 23:56 lib/libhistory.so.4 > -rwxr-xr-x 1 root root 289484 Jan 20 2002 lib/libncurses.so.5 > -rwxr-xr-x 1 root root 156144 Dec 13 00:39 lib/libreadline.so.4 > -r-xr-xr-x 1 root root 433 Dec 25 18:24 linuxrc > -rwxr-xr-x 1 root root 5876 Jan 11 17:15 sbin/insmod > -r-xr-xr-x 1 root root 329956 Jan 11 17:13 sbin/lvm > -rwxr-xr-x 1 root root 18556 Jan 11 17:15 sbin/modprobe > > Note: I'm using kernel 2.5.69, so instead of modprobe.conf you should > use modules.conf, the only purpose of this file in conjunction with > modprobe is to suppress a lot of kernel messages that say it couldn't > load the module for major blabla). The shared libraries were used by my > bash, you can check that with ldd. > > The shell script /linuxrc looks like this (note: I removed the > indentation to fit everything into one line, you might want to correct > this): > > #!/bin/sh > /bin/mount /proc > echo /sbin/modprobe > /proc/sys/kernel/modprobe > if test ! -e /dev/.devfsd ; then > set -e > MAJOR=$(/bin/sed -n 's/^ *\([0-9]\+\) \+misc$/\1/p' /proc/devices) > MINOR=$(/bin/sed -n 's/^ *\([0-9]\+\) \+device-mapper$/\1/p' /proc/misc) > if test -n "$MAJOR" -a -n "$MINOR" ; then > /bin/mknod --mode=600 /dev/mapper/control c $MAJOR $MINOR > fi > fi > /sbin/lvm vgchange --ignorelockingfailure -a y > /bin/umount /proc > > The other text files contain this: > > chtephan:/mnt/tmp # cat etc/mtab > /dev/ram0 / ext2 rw 0 0 > chtephan:/mnt/tmp # cat etc/fstab > /dev/ram0 / ext2 defaults 0 0 > proc /proc proc defaults 0 0 > > You can also find this ramdisk under > http://www.saout.de/misc/initrd-2.5.67-lvm2-athlon.gz - as the name > suggets my libc is athlon optimized, so you might want to replace some > libraries or executables. > > BTW: I've also got some lilo patches on that page (remove the filename > after the last slash) that make it recognize device-mapper volumes. >