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Date: Wed, 12 Sep 2007 16:48:00 +0200
From: Farkas Levente <lfarkas@bppiac.hu>
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Subject: Re: [linux-lvm] is it possible to move lvm2 logvols?
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Robert Sander wrote:
> On Wed, 12 Sep 2007 00:42:06 +0200,
>  Farkas Levente <lfarkas@bppiac.hu> wrote:
>> hi,
>> hi we've got a server with a lvm2 pv with a dozen of logvol in it. under
>> the lvm we'd like to create a raid1 array on 2 disk. unfortunately we
>> create raid0 under it. but the logvols contains a lots of important
>> data. we'd like to
>> - put 2 new disks into the system,
>> - create the raid1 array on it,
>> - put a new volgroup over the raid1,
> 
> Hi!
> 
> Do not create a new vg.
> Add the raid1 as a second pv to the existing vg.
> Use pvmove to move the logical volumes from one pv to the other.
> This is an online operatipn.

ok everything seems to working. after i move the logvols i remove the
old pv and try to boot the system. now the problem during the boot linux
can't find the volume group so can't find it's / since the / is on the
first logvol of the vg. this on centos-5.
the strange thing if i boot from centos rescue dvd it see the vg and
logvols too and i can chroot /mnt/sysimage into the new real system.
what can be the reason that if i boot the new system it can't find the
vg and it's logvols?

-- 
  Levente                               "Si vis pacem para bellum!"