Error: A specified parameter was not correct vim.host.diskpartitioninfo.spec
SSH to esxi (enable ssh via console if not enabled) then:
esxcfg-scsidevs -l
then
partedUtil delete <DISK> <PARTITION>
example:
partedUtil delete (Gave invalid partition number) :
partedUtil delete /vmfs/devices/disks/naa.600508b1001c7ef7f736cd3dbeb5915d vml.0200010000600508b1001c7ef7f736cd3dbeb5915d4c4f47494341
Cheers,
TK