VMDK to RDM: Failed to clone disk : The destination file system does not support large files (12)

Found the problem.
I should have been typing -d rdmp:/vmfs/devices/disks/naa.6000d7740000ae9a58b17d3967a37e6f instead of -d rdmp:/vmfs/devices/disks/naa.6000d7740000ae9a58b17d3967a37e6f:1. The :1 at the end was suppose to designate LUN1, I thought. Obviously not. Not sure why that warrants the error that the destination file system does not support large files… but there you go.

/usr/sbin/vmkfstools -i /vmfs/volumes/4b548b33-4e890e10-6440-001517bda1dc/SQLSERVER/SQLSERVER_1.vmdk -d rdmp:/vmfs/devices/disks/naa.6000d7740000ae9a58b17d3967a37e6f:1 /vmfs/volumes/4b548b33-4e890e10-6440-001517bda1dc/SQLSERVER/SQLSERVER_3.vmdk