The following patch is employed at our company to enable the use of
/dev/vg/lv syntax in the root argument on the kernel command line. It
simply adds an extra case check, for the alternative syntax. I realise
that /dev/vg/lv is a symlink and not the 'real' root device node. But
given the symlink is widely deployed in fstab - after all why else does
dm-mapper create this convenient symlink? - I don't suppose it does any
harm to make this an option on the kernel command line too.
# diff -ubw initramfs-tools/scripts/local-top/lvm
initramfs-tools.new/scripts/local-top/lvm
--- initramfs-tools/scripts/local-top/lvm 2007-04-13
12:17:29.000000000 +0100
+++ initramfs-tools.new/scripts/local-top/lvm 2009-02-17
17:23:29.000000000 +0000
@@ -37,11 +37,9 @@
;;
esac
- # Make sure that we have a d-m path
+ # See if we have a /dev/mapper/vg-lv path
vg=${vg#/dev/mapper/}
- if [ "$vg" = "$1" ]; then
- return 1
- fi
+ if [ "$vg" != "$1" ]; then
# Make sure that the device includes at least one dash
if [ "$(echo -n "$vg" | tr -d -)" = "$vg" ]; then
@@ -54,6 +52,21 @@
vg=$(echo ${vg} | sed -e 's#--#-#g')
vgchange -ay ${vg}
+ return 0
+ fi
+
+ # See if we have a /dev/vg/lv path
+ vg=${1#/dev/}
+ if [ "$vg" != "$1" ]; then
+
+ # Split volume group from logical volume.
+ vg=$(echo ${vg} | sed -e 's#\(.*\)\([^/]\)/[^/].*#\1\2#')
+
+ vgchange -ay ${vg}
+ return 0
+ fi
+
+ return 1
}
if [ -e /scripts/local-top/lvm2 ]; then
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