A client's rack cabinet has an APC SMT1500 2U device to which all networking and telecommunications equipment is connected. Load is currently 330W with approx 35 minutes run time. Client is running a peer to peer workgroup at the moment.
The client wants to introduce 2 Dell R430 rack mount servers (running ESXi) with redunant PSUs. It seems that the existing UPS will not be large enough to cope with the additional load of 2 rack servers and have enough runtime to gracefully shutdown the hosts and guests. Therefore we are looking at purchasing an additional APC unit.
I have read a lot of threads on this (this one is particularly good: http://community.spiceworks.com/topic/605917-connecting-a-server-with-dual-power-supplies-to-ups) but i'm still looking for some advice.
How would you connect up the various devices bearing in mind that:
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