How does one manually build an initrd to mount an LVM2 root partition?
I'm aware of the lvmcreate_initrd tool, but in my distribution (Debian unstable) it accompanies LVM1, not 2; besides, I am building the initrd for a foreign architecture, so I think I would have to build it manually anyway.
I've read the LVM HOWTO, particularly http://www.tldp.org/HOWTO/LVM-HOWTO/upgradetolvmroot.html, which mentions initrds, but I couldn't find any instructions for manually building an LVM initrd. Can someone suggest some documentation to me?
Currently, I am confronted with the following problem, when I run vgscan on my initrd:
# vgscan Locking type 1 initialization failed. #
I suspect this may be because I'm using a read-only filesystem? According to this (almost ancient?) message: http://www.redhat.com/archives/linux-lvm/2003-January/msg00184.html, vgscan requires a writable filesystem; Is this still the case?
This message describes using tmpfs to avoid this problem: https://www.redhat.com/archives/linux-lvm/2003-January/msg00259.html; are these instructions accurate?
Thanks very much; any help much appreciated!
Jack
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