VMAX 10K Vault environmental factor

Hi,

I would like to know for a VMAX 10K.   What sort of failure combination will trigger the system to vault?

Minimum number of vault drive 7,  Total is 20

Total number of cage fan is 4, minimum is 3

Minimum number of power source 1.  Total is 2

One more tough question, if I lost power zone A and at the same time I lost one director either 1 or 2.  Will this trigger the vault process?   I recalled there is a management module that connect to the SPS module.