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How to get root on LVM on RAID with Debian

Root-on-LVM-on-RAID with debian mkinitrd HOWTO

I have a Debian system running with root on LVM on RAID. Kernel updates, however, require either a manual update of an initrd file, or a custom kernel compile to include all required modules.

I really wanted to use apt-get/dpkg to install kernel upgrades straight from the official Debian binaries, so I spent some time and got Debian's mkinitrd script working with root on LVM on RAID.