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Re: [linux-lvm] Move an array/volgroup to another machine.



Eric Brunson wrote:
On 04/16/2009 10:33 AM, Gerry Reno wrote:
Eric Brunson wrote:
On 04/16/2009 10:12 AM, Eric Brunson wrote:
On 04/16/2009 10:07 AM, Gerry Reno wrote:
We built a replacement server (x86_64) for an older server (x86). Now we want to move a RAID-5 array intact from the older machine over to the new machine. We know the UUID of the array and of all the PV and VG on the array. So what commands should we perform after plugging in all the array drives to the new server to bring up the array and lvm on the new machine?

"vgscan" and "vgchange -a VGNAME" I believe.


Sorry, doing three things at once:  vgchange -a y VGNAME



Make sure your VG name doesn't conflict with any already in the machine.

Will vgchange activate the raid array?


Is it an md (software) RAID or a hardware RAID device?

If the former, then I'm not sure. I'll have to defer to someone with more md experience. If the latter, then it depends of if you have the correct drivers and hardware detection.



The new server just has a couple raid-1 arrays on it right now. But we need the raid-5 to be activated because there is a volgroup that uses the raid-5 device as it's PV.

It's an 'md' software raid device. I think we can probably just try to assemble the array using the UUID. Maybe something like:
mdadm -vv -A /dev/md4 --uuid=UUID

Regards,
Gerry


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