brjgs726:/} cat /etc/lvm/lvm.conf |grep filter
    # A filter that tells LVM2 TO only USE a restricted SET OF devices.
    # The filter consists OF an array OF regular expressions.  These
    # Don't have more than one filter line active at once: only one gets used.
#####    filter = [ "a/.*/" ]
     filter = [ "a|/dev/mapper/mpath.*|", "a|^/dev/dm-2$|", "r].*|" ]
    # filter = [ "r|/dev/cdrom|" ]
    # filter = [ "a/loop/", "r/.*/" ]
    # filter =[ "a|loop|", "r|/dev/hdc|", "a|/dev/ide|", "r|.*|" ]
    # filter = [ "a|^/dev/hda8$|", "r/.*/" ]
    # The results of the filtering are cached on disk to avoid