1) fdisk -l
this would show which device doesn’t have a partition.
2) dd if=/dev/sd(x) of=/tmp/dump_sdx.txt count=100 bs=1024
file /tmp/dump_sdx.txt shows x86 boot sector.
strings /tmp/dump_sdx.txt shows some vmdk files
3) fdisk -lu /dev/sd(x) shows that there are no partitions on the disk.
4) ran fdisk /dev/sd(x). created new partition spanning entire lun and then used partition type fb.
5) run “vmkfstools -V”
That’s it