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

[Gerry Reno]

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