Re: Boot / LVM best practices
I think the main question you should ask yourself is: "Do I want redundancy?"
* Yes? Now you know the drives should have equal size, reflecting your
needs. It's also a good idea to get identical drives.
You'll then probably create a big volume group over the entire RAID.
* No? Then you're free to get whatever you need in addition to your
existing drive (why throw it away? well, okay.)
You'll just have to create some new logical volumes on the new drive, and
assign them to your existing volume group, effectively expanding it. That's
where LVM really shines, by the way.
As others have said, there's no reason for the boot drive to be "as small as
possible".
Also, GRUB2 supports RAID and LVM [1], so you can even put the /boot
partition on a logical volume. Some people will probably say "that makes
recovery harder"; which is true only if you have inappropriate recovery
tools. I really see no problem with that, and it makes more sense to
integrate it with everything else, IMO -- not doing that looks like a hack.
I still agree with the others about your filesystems layout, but maybe you
want to just ask yourself the same question I asked myself some weeks ago:
"Up to where is it worth the trouble?" [2].
-thib
PS Do your backup and start incrementals every hour now :-)
[1] http://grub.enbug.org/LVMandRAID
[2] http://lists.debian.org/debian-user/2010/02/msg01945.html
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