Re: LVM2 logical volumes on Loop-AES

On Fri, 17 Aug 2007 21:18:08 +0300
Jari Ruusu <[email protected]> wrote:

> 4a) mount /proc
http://sources.redhat.com/cgi-bin/cvsweb.cgi/~checkout~/LVM2/scripts/lvm2create_initrd/lvm2create_initrd?content-type=text/plain&cvsroot=lvm2&only_with_tag=HEAD
includes:
# We need /proc for device mapper
echo "$PRE Mounting /proc"
mount -t proc none /proc
> 4b) mount /sys
http://sources.redhat.com/cgi-bin/cvsweb.cgi/~checkout~/LVM2/scripts/lvm2create_initrd/lvm2create_initrd?content-type=text/plain&cvsroot=lvm2&only_with_tag=HEAD
does not say anything about /sys.
> 4c) run /lib/losetup -a
> 4d) unmount /sys
> 4e) unmount /proc
> 
> That "mknod dev/root b 7 5" (line 765) at the end of the patch
> decides what device gets mounted at step 5. You need to change that.
Based on:
mr-nosey ~ # ls -la /dev/mapper/vg-root 
brw------- 1 root root 254, 0 Aug 19 06:04 /dev/mapper/vg-root
The line in build-initrd.sh read (high levels of guessing going on
here):
mknod dev/root b 254 0

I don't know about this.  That lvm2create_initrd script says, "#
Device-Mapper dynamically allocates all device numbers. "
> Also, step 4c (at line 564) needs to be changed to run "/lib/lvm
> vgscan". 
I also tried the --ignorelockingfailure option.
> /lib/rootsetup script and /lib/sh and other programs
> (/lib/lvm excluded) that you copied to your boot partition can be
> removed. Set USEROOTSETUP=0 in build-initrd.sh config, this plan B
> does not need that.
> 
> This time I tested this patch. I don't have lvm on my test box, so I
> used "/lib/losetup -a" as the program to run between loop setup (at
> step 4) and mount (at step 5).
> 
I used the "2007-08-17 22:12" patch when testing.

The error returned by the patched script, after entering the password
for losetup, was:
"Failed to create LVM2 system dir for metadata backups, config files
and internal cache.

Set environment variable LVM_SYSTEM_DIR to alternative location or
empty string."

This appears to be consistent with a line in 
http://sources.redhat.com/cgi-bin/cvsweb.cgi/~checkout~/LVM2/scripts/lvm2create_initrd/lvm2create_initrd?content-type=text/plain&cvsroot=lvm2&only_with_tag=HEAD
"echo "$PRE Remounting / read/write"
mount -t ext2 -o remount,rw /dev/ram0 /"

Jari, I think you're getting closer.  I can almost smell that booting
logical volume.

Regards

Fog_Watch.


-- 
Lose wait.  Get Gentoo.

-
Linux-crypto:  cryptography in and on the Linux system
Archive:       http://mail.nl.linux.org/linux-crypto/