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
--
Pavel Lisy <pavel.lisy at gmail.com>