Virtualization VMWare ESX and Win2k3 as a Guest OS

Does anyone have any suggestions for running PG2.9 on win2k3 running
as a guest on VMware ESX ?

Currently the system is shutting down and transactions are terminating
with the messages indicating there is not available disk space, when
in fact there is plenty of disk space available.

Google tells me "don't do it",  but other than adjusting fsync, is
their any other suggestions.

Unfortunately, installing *nix as the host is not an option.

g.