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From: "Tomasz Nowak" <tnowak@netventure.pl>
Date: Thu, 24 Feb 2011 12:54:21 +0100
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Subject: [linux-lvm] [SOLVED] Re: Errors after adding new md pv (boot only?)
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To: linux-lvm@redhat.com

"Bryn M. Reeves"  wrote:
> [...]
> You need to rebuild your initramfs (mkinitrd on CentOS 5.5) to include the
> configuration for the newly defined MD array.
> 
> Something like:
> 
> mkinitrd /boot/initrd-$(uname -r).img $(uname -r)

Bryn, thank you very much. Recreating initrd img solved the problem.

I have no idea why it wasn't neccessary on my previous systems..
Probably, before such disk-upgraded system was first rebooted, initrd*.img
was recreated automaticly during a (yum) kernel update procedure.
That could be an explanation.

-- 
Tomasz