Why is kernel crash dump capture over NFS failing with RHEL6.4-based RHEV-H?

Issue

• Failure to capture a vmcore of RHEV-H using NFS
• I'm trying to get kerneldumps to NFS working, when I panic the system, it's telling it's generating a coredump, but none is created:

user@head02:/Volume01/kdump$ ls -lha
total 6
drwxr-xr-x   2 36       36             2 Apr 12 12:05 .
drwxr-xr-x  24 root     root          24 Apr 12 11:02 ..

When I mount this directory myself on the RHEV-H system, I can write to it. I even changed the owner id to 36.