Unable to power on VM - Cannot allocate memory

Issue : unable to power on a vm with 2 under 100GB disks and 4 2TB disks (vmdk). when tried to power on the VM it says Reason 0 : Cannot allocate memory.

What worked : vmotion the VM to a different host.

add the vmdks to the vm.

power on the vm

OR

vmotion the vm, power on the vm, add the vmdk disks.

What did not work: Remove the 2tb vmdk disks, power on the VM and then add the disks. We were able to add only 2 disks but not all.

Cause : 

https://communities.vmware.com/thread/451279?start=0&tstart=0

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1004424