On Wed, Feb 06, 2013 at 01:43:05PM +0200, Robert wrote: > Hi, > > Today I created a mirror due to some data migrations I am doing, and > the funny thing is that two mirror legs ended up on the same physical > volume: > > # lvs -a -o +devices > LV VG Attr LSize Origin Snap% Move Log Copy% > Convert Devices > oraarch sapvg -wi-ao 20.00G > /dev/dm-18(0) > oracle sapvg -wi-ao 5.00G > /dev/dm-18(5120) > orapta sapvg mwi-ao 299.12G > 100.00 orapta_mimage_0(0),orapta_mimage_1(0) > [orapta_mimage_0] sapvg iwi-ao 299.12G > /dev/dm-5(11520) > [orapta_mimage_0] sapvg iwi-ao 299.12G > /dev/dm-3(12800) > [orapta_mimage_0] sapvg iwi-ao 299.12G > /dev/dm-3(30002) > [orapta_mimage_0] sapvg iwi-ao 299.12G > /dev/dm-4(0) > [orapta_mimage_0] sapvg iwi-ao 299.12G > /dev/dm-4(9913) > [orapta_mimage_0] sapvg iwi-ao 299.12G > /dev/dm-6(0) > [orapta_mimage_1] sapvg iwi-ao 299.12G > /dev/dm-6(34249) > [orapta_mimage_1] sapvg iwi-ao 299.12G > /dev/dm-16(0) > [orapta_mimage_1] sapvg iwi-ao 299.12G > /dev/dm-17(0) > ... > ... > > Here you can see /dev/dm-6 contains part of both mirror legs. > > I have to admit I just used the command: > lvconvert -m1 --corelog sapvg/orapta > not specifying the target pv's as I thought LVM would calculate it for itself. > > There should be a rule in place to never use the same PV for the > second leg of a mirror that is used by the first shoudln't there? I assume you have an --alloc=anywhere setting somewhere. Try to reproduce with an explicit --alloc=normal. See also man lvm Lars > I am using a statically compiled version of LVM so I can use it on > different machines that are older than SLES11SP2 as the older distro > won't allow me to mirror multi segmented LV's. > > # /tmp/lvm.static version > LVM version: 2.02.98(2) (2012-10-15) > Library version: 1.02.77 (2012-10-15) > Driver version: 4.15.0 > > Thanks! > Robert -- : Lars Ellenberg : LINBIT | Your Way to High Availability : DRBD/HA support and consulting http://www.linbit.com _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
