GRUB 2.00 has support for ZFS-on-Linux (the out-of-tree kernel module, as opposed to the ZFS FUSE implementation). I wrote some of the code that was added in 2.00; so that is where I fit into all this.
When booting off a ZFS root filesystem, GRUB sets this: root=ZFS=pool_name/dataset/path For a real world example, following Solaris's convention, this is what I use in my HOWTO: root=ZFS=rpool/ROOT/ubuntu Darik Horn is doing a wonderful job maintaining ZFS-on-Linux support in an Ubuntu PPA. With regard to Debian, he's been taking care to keep the PPA compatible with Debian, and he's working to learn how to get packages in Debian itself. See the last email on: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=686447 initramfs-tools is nicely extensible via "boot=foo", where the foo scripts will then be loaded. Darik has used this for ZFS. However, "boot=zfs" still has to be set manually in the GRUB config (or he has to ship a patched GRUB package). As more things have been upstreamed, we're getting close to the goal of not needing any modified packages (only the addition of ZFS packages) for things to work "out of the box". Accordingly, I propose this patch to initramfs-tools: diff --git a/init b/init index cb832ff..01210ae 100755 --- a/init +++ b/init @@ -103,6 +103,9 @@ for x in $(cat /proc/cmdline); do /dev/nfs) [ -z "${BOOT}" ] && BOOT=nfs ;; + ZFS=*) + [ -z "${BOOT}" ] && BOOT=zfs + ;; esac ;; rootflags=*) -- Richard
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