after migration from SUN Storage 7410 to IBM V7000 i notice that the virtual machien take a long time than usual when power it ion and some time it is get the operation time out.
the only thing that changed in your setup seems to be your storage so concentrate troubleshotting on that.
it could be a mis configuration on the storage side.
I'm not sure, but you may try to cleanly shut down the VM rather than to suspend it. If you cannot access the VM/cannot shut it down, you may delete the .vmss file in the VM's folder, which is comparable to a hard reset on a physical system (e.g. pulling the power plug).