Oracle VM: DomU/Guest VM Server Isn't Seeing The Correct LVM Volume Size (Doc ID 2630356.1)

Last updated on FEBRUARY 26, 2020

Applies to:

Symptoms

An Oracle Linux running as DomU/Guest VM is not seeing the correct LVM Volume size.

Further details found below:

1. The volume shows as 500GB in pvscan, but 200GB in lvmdiskscan.

[root@guest-localhost ~]#pvscan -v --config global locking type 0 | grep xvdb
 PV /dev/xvdb                       lvm2 [500.00 GiB]

[root@guest-localhost ~]# lvmdiskscan -v
  /dev/OS_VG/LV_ROOT [ 10.00 GiB]
  /dev/xvda1 [ 1.00 GiB]
  /dev/OS_VG/LV_SWAP [ 20.00 GiB]
  /dev/xvda2 [   /dev/OS_VG/LV_USR [ 18.55 GiB]
  /dev/OS_VG/LV_USRTMP [   /dev/OS_VG/LV_VAR [ 18.00 GiB]
  /dev/OS_VG/LV_TMP [ 16.00 GiB]
  /dev/OS_VG/LV_OPT [ 10.00 GiB]
  /dev/OS_VG/LV_HOME [ 20.00 GiB]
  /dev/vg_d04/lv_d04 [   /dev/xvdb [ 200.00 GiB] LVM physical volume
  /dev/xvde [ 1.00 TiB] LVM physical volume
  8 disks
  2 partitions
  2 LVM physical volume whole disks
  1 LVM physical volume

2. From /var/log/messages:

Jan 10 05:50:11 guest-localhost lvm: WARNING: Scan found duplicate PVs.
Jan 10 05:50:11 guest-localhost lvm: WARNING: Not using lvmetad because cache update failed.
Jan 10 05:50:11 guest-localhost lvm: WARNING: Not using device /dev/xvdc for PV <LVM UUID>.
Jan 10 05:50:11 guest-localhost lvm: WARNING: PV <LVM UUID> prefers device /dev/xvdb because of previous preference.
Jan 10 05:50:11 guest-localhost lvm: WARNING: Device /dev/xvdb has size of 419430400 sectors which is smaller than corresponding PV size of 2147479552 sectors. Was device resized?
Jan 10 05:50:11 guest-localhost lvm: One or more devices used as PVs in VG vg_d02 have changed sizes.

Changes

Cause

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