I have 6 servers both with 2 power supplies attached to an UPS. I want to add 4 more servers but the UPS is full and due to budget restriction I couldn't buy a new one for months. The 6 + 4 new servers are running essential services (high uptime required).
- What is the power supply failure rate or how many failure have you experienced so far ?
- If the failure rate is low, how safe is it to use only one psu per server and keep the redundant one as backup if the first one fails ?
- Does it make sense to connect one psu to the UPS and the second one to a normal plug ?