Re: Assigning new pv to a volume group

From: Helmut Leininger (h.leininger_at_web.de)
Date: 08/18/05 

Date: Thu, 18 Aug 2005 10:52:45 +0200

kittappa wrote:

>Hi
>
>Please advice me on the following:
>
>We have a volume group contains 2 SSA physical disks. These are not
>mirrored.
>
>
>My objective is:
>
>To export this volume group
>Add another PV to SSA and make it as "RAID 5"
>import the volume group again.
>
>Is it possible to do this with out backing up and restoring the data?
>Please advice. We are using AIX 4.3.3
>
>Regards
>Siva
>
>
>
Siva,

There is no way to do this without backup/restore.
Raid 5 is not just an additional disk but the data are striped over all
three disks with parity in rob around. So, creating a RAID 5 will need
to overwrite the information on the disks -> no import possible any more.

Regards
Helmut

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