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Re: [Xen-users] domU -->Failure: failed to start /dev/md1

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] domU -->Failure: failed to start /dev/md1
From: Andy Smith <andy@xxxxxxxxxxxxxx>
Date: Sun, 2 Sep 2007 01:26:16 +0000
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Hi,

On Sat, Sep 01, 2007 at 09:51:38PM +0100, Nico Kadel-Garcia wrote:
> Is there *ANY* reason to do software RAID, LVM, or other filesystem 
> cuteness in a DomU? Except maybe for configuration testing purposes? Let 
> the Dom0 do the work, I'm quite certain it will be more efficient about it.

I generally agree, although I have some customers who want to manage
their own filesystems with LVM, so for them I give them one block
device with / on and another with nothing on for them to use as an
LVM PV as they please.  So that ends up as LVM on LVM on RAID.  I'm
sure there's a performance hit but haven't benchmarked exactly how
much.

It also has the advantage that when they want more disk space I can
attach another block device and they can add this to their VG
without having to reboot their domU.

Cheers,
Andy

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