* Rich Freeman <ri...@gentoo.org> [150203 08:36]: > On Tue, Feb 3, 2015 at 8:14 AM, Alan Mackenzie <a...@muc.de> wrote: > > So, what was it that chewed up my RAID configuration so badly that > > /dev/md6 got renamed to /dev/md127? Can I change it back to /dev/md6, > > somehow? Do I need to bother? > > I ran into similar issues a while back. In my case some of my arrays > were using older metadata (which was required at the time to boot > without an initramfs). I suspect that either this metadata lacked the > info needed for a boot CD to assign the same ID, or perhaps the ID I > was using was already allocated somehow and the boot CD chose another > one and wrote that ID to the metadata so that it stuck. > > My solution was to move to using UUIDs or labels for everything and > not relying on array numbering. This of course requires an initramfs > - personally I've found Dracut to be the best one out there. It is > just far less prone to breakage when some update causes stuff to move > around like this.
I also had the same problem a while ago and like Rich I started using UUIDs (actually I had started on another system where it mounted my /home partition as /tmp and rm -rf'd it during startup because of the /dev/md devices being scrambled around, but at that point I switched all my systems to UUIDs.) I also use dracut and aside from some problems with it starting up my raid arrays, it works well and I don't think much about it. Todd
