software raid auto assembly problem on Xen host
torriem at gmail.com
Wed Mar 3 15:00:53 MST 2010
Nicholas Leippe wrote:
> The option you're looking for is --homehost= during array creation.
> It affects the metadata, and depending on the superblock version you
> chose the UUID.
> I don't know if you can change it after-the-fact.
> I do know that only 0.90 superblocks is supported for some operations
> (booting off of raid1 I believe is one of them), despite the 1.0
> version being several years old and improved in a few ways. Go figure.
Unfortunately since RHEL itself made the RAID during install, who knows
if it did the right thing with homehost or not.
If I read the manpages correctly, this is how you would change it after
the fact (as an example):
mdadm -A /dev/md4 --homehost=<vmhostname> --update=homehost --auto=yes
However this had no effect. The host still happily assembles
everything, even things with this new homehost. I'm wondering if
there's not a bug in the redhat initrd stuff.
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