[linux-lvm] Convert a non-striped LV to a striped LV without data loss?

Doug Eubanks admin at dougware.net
Tue Dec 30 20:04:33 UTC 2008

Yeah, that's basically what I want to do.  Technically, one of the pvs is in
use and has the lv on it.  I have three perc controllers in the system and
wanted to stripe the root partition across all three arrays instead of
having it sit on one array.

I think the only option I have is to extend the current lv and specify that
it should use 3 stripes for the extention, but I can't figure out how to
move the existing data from the old linear potion of the logical volume.
I'm hoping that some incarnation of lvreduce could do that.

Doug Eubanks
admin at dougware.net

On Tue, Dec 30, 2008 at 2:57 PM, Stuart D. Gathman <stuart at bmsi.com> wrote:

> On Tue, 30 Dec 2008, Doug Eubanks wrote:
> > No, I have a current linear lv that I want to stripe across three
> different
> > hardware based RAID 5 controllers (3 pvs).
> I think he wants to know if he can add the 3 new PVs to the same volume
> group as the linear lv (of course), and then migrate the LV to be striped
> across the 3 PVs.
> As far as I can see, this is certainly possible with device mapper - but
> I'm not aware of any support in current user mode tools.
> --
>              Stuart D. Gathman <stuart at bmsi.com>
>    Business Management Systems Inc.  Phone: 703 591-0911 Fax: 703 591-6154
> "Confutatis maledictis, flammis acribus addictis" - background song for
> a Microsoft sponsored "Where do you want to go from here?" commercial.
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