Thanks again Wodel,
lsblk just showed /dev/sdb as a disk.
Commenting out ‘use_devices_file=1’ in lvm.conf and then ran ‘vdsm-tool config-lvm-filter’
which said /dev/sdb part of multipath.
Added ‘wwid “*”’ to the blacklist section of multipath.conf and node booted properly.
Regards
Simon…