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Date: Wed, 12 Sep 2007 17:51:38 +0200
From: Farkas Levente <lfarkas@bppiac.hu>
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Subject: Re: [linux-lvm] is it possible to move lvm2 logvols?
References: <46E719BE.5000202@bppiac.hu>	<slrnfeesv8.dn9.robert.sander@raman.epigenomics.epi>
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Farkas Levente wrote:
> 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?

already find the old initrd contains only raid0.ko so it can't find the
raid1 disk:-(

-- 
  Levente                               "Si vis pacem para bellum!"