[CentOS] Found duplicate PV

[Markus Falb]

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.

> 
> 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)

-- 
Thank You, Markus