Hey, (sorry for cross-posting, you will find this message also in centos-virt, maybe, but this was not intended and a mistake)
I have a system with a mdraid 1
... md1 : active raid1 sdb2[1] sda2[0] 1465031488 blocks [2/2] [UU] ...
this raid partition has a lvm physical volume with one volume group and several logical volumes. This machine is running since years and I seldom touch the lvm config. The lvm commands are giving me strange warnings I am uncomfortable with
... # pvdisplay Found duplicate PV b79x0kLXR9mAC0z0IZUxyJG1VC24Crl7: using /dev/sda2 not /dev/md1 --- Physical volume --- PV Name /dev/sda2 VG Name vg_sys PV Size 1.36 TB / not usable 6.81 MB Allocatable yes PE Size (KByte) 32768 Total PE 44709 Free PE 17701 Allocated PE 27008 PV UUID b79x0k-LXR9-mAC0-z0IZ-UxyJ-G1VC-24Crl7 ...
What does this "Found duplicate PV b79x0kLXR9mAC0z0IZUxyJG1VC24Crl7: using /dev/sda2 not /dev/md1" message? Some logical volumes are virtual disks vor kvm guests. Are these guests using sda only and not the mdraid?