[linux-lvm] unable to create mirror in LVM using lvconvert

Stuart D. Gathman stuart at bmsi.com
Sat Oct 22 21:26:48 UTC 2011

On Sat, 22 Oct 2011, sabari G wrote:

> when i try to 
> lvconvert -m 1 vgnew/lvol4 
> "not enough free pv for creating parallel allocation.."

By default, and for best performance, the bitmap must be on a 3rd PV. 
There are options to place the bitmap on the same PV as a leg, or to
keep it in memory (requiring a resync at boot).

Also, I hope your setup is for testing only.  Putting mirror legs on
the same device doesn't protect you much.

 	      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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