Be default, you cannot suspend your Boot Camp virtual machine. Booting the operating system of a suspended Boot Camp virtual machine natively (not through the Boot Camp virtual machine) will seriously damage the Boot Camp partition, making it unusable. As a result, all data on your Boot Camp partition may be lost.
If you still want to be able to suspend your Boot Camp virtual machine, do the following:
disp.allow_to_suspend_bootcamp_vm=1
With this system flag in the virtual machine configuration, you will be able to suspend your Boot Camp virtual machine.
Warning! Be sure not to use your Windows Boot Camp partition natively when your Boot Camp virtual machine is suspended: this may damage the Boot Camp partition.
If you want to disable this option, modify the system flag as follows:
disp.allow_to_suspend_bootcamp_vm=0