lvm: added excluded by a filter bugfix

wiki/linux/lvm.md

@@ -4,7 +4,11 @@
 
 ## Create VG for proxmox
 
+We will use `/dev/sdb` as our drive.
 Setup the disk for the physical volume with `sgdisk -N 1 /dev/sdb`.
-Then create the physical volume `pvcreate --metadatasize 250k -y -ff /dev/sdb1`.
-And finally create the volume group `vgcreate vmdata /dev/sdb1`.
+Then create the physical volume `pvcreate /dev/sdb`.
+The previous step can come to a halt when the device already contains an old
+partition table and will display the error `Device /dev/sdb excluded by a filter`.
+This can be solved by removing the old partition table with `wipefs -a /dev/sdb`.
+And finally create the volume group `vgcreate vmdata /dev/sdb`.
 Then follow the guide in proxmox on how to connect a `vg` to proxmox.