Re: [linux-lvm] LVM rootfs and cramfs as ramdisk

[Francis SOUYRI <francis souyri wanadoo fr>]

Hi Jan,

On my system lvm driver is in the kernel (no module).

/#!/bin/sh

I mount /etc with a tmpfs to have /etc in rw (I do not need the 
"/etc/fstab").

mount -t tmpfs none /etc

Now I mount /proc because "vgscan" need to access "/proc/partitions" (I 
do not need the "/etc/fstab").

mount -t proc none /proc

Finaly I can scan for the volume groups and activate these volume groups.

echo "Scanning for Volume Groups..."
/sbin/vgscan
echo "Activating Volume Groups"
/sbin/vgchange -a y

I umount /proc and /etc because, I do not need now the "/etc" (you need 
to do a vgscan in the startup script of your system to update the 
"/etc/lvm*" files in the real "/etc"), and the kernel after the mount of 
the real / mount the /proc.

umount /proc
umount /etc

I do not need any files in the "/etc" I only need to create temporaries 
files with vgscan.

Best regards.

Francis

Jan H. van Gils wrote:

> > Hi Jan,
> >    
>
> Hi Francis,
>
>  
>
> > You need "/etc" in rw for this you can mount "/etc" in the "linuxrc" 
> > script using a tmpfs filesystem like this:
> >
> >    
>
> Thanks for the information.
> I was already wondering if I was the only one with this problem.
>
> But what about the init files that are normaly in "/etc" ?
> I can imagion that a tmpfs is an empty filesystem.
> Or do I not fully understand what you mount option does ?
>
>  
>
> > /#!/bin/sh
> > ...
> > mount -t tmpfs none /etc
> > mount -t proc none /proc
> > echo "Scanning for Volume Groups..."
> > /sbin/vgscan
> > echo "Activating Volume Groups"
> > /sbin/vgchange -a y
> > ...
> > umount /proc
> > umount /etc
> > /
> > I used "romfs" for the "initrd" ramdisk.
> >
> > Best regards.
> >
> > Francis
> >
> >    
>
> With regards Jan
>
>
> ----
> With regards Jan H. van Gils
> Internet web-page http://www.Knoware.NL/users/janvg/
> Internet e-mail address JanVG Knoware NL
> RIPE Whois JHG5-RIPE, 6BONE Whois JHG1-6BONE
>
>
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