Markus Falb píše v St 04. 12. 2013 v 15:44 +0100:
On 04.Dez.2013, at 15:08, Nux! wrote:
On 04.12.2013 13:43, Markus Falb wrote:
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?
Markus,
I see /etc/lvm/lvm.conf has an option to ignore md members and seems on by default in EL6: md_component_detection = 1
This is a CentOS 5, but it also has this in lvm.conf, and it's value is 1.
from man lvm.conf --- md_component_detection — If set to 1, LVM2 will ignore devices used as components of software RAID (md) devices by looking for md superblocks. This doesn’t always work satisfactorily e.g. if a device has been reused without wiping the md superblocks first. ---
If you run "pvdisplay /dev/sda2" what does it show? Normally you should get a "Failed to read physical volume "/dev/sda2".
# pvs /dev/md1 Found duplicate PV b79x0kLXR9mAC0z0IZUxyJG1VC24Crl7: using /dev/sda2 not /dev/md1 PV VG Fmt Attr PSize PFree /dev/sda2 vg_sys lvm2 a-- 1.36T 553.16G
# pvs /dev/sda2 Found duplicate PV b79x0kLXR9mAC0z0IZUxyJG1VC24Crl7: using /dev/md1 not /dev/sda2 PV VG Fmt Attr PSize PFree /dev/md1 vg_sys lvm2 a-- 1.36T 553.16G
ADditionally you can force a filter on the drives, smth like: filter = ["r|/dev/sda2"]
I might try that, but it is not necessary on other machines with the same setup. It was not necessary on *this* machine (running since several years)
I've seen this problem on two machines (It came after some update on CentOS 5 )
you can set filter more strict to avoid bad detection filter = [ "a/.*/" , "r|/dev/md.*|" ]
Pavel