A good PSU for unRaid has the following:   1. Single 12 volt rail.  A subsequent figures refer to the 12 volt rail. 2. The minimum capacity that can power your build. Any more will just waste power. All drives will be in use during startup, shutdown, parity check, parity build, failed drive emulation, and drive rebuild, but startup requires the most power. 3. 2 amps (24 watts) per green drive and 3 amps (36 watts) per non-green drive on the 12 volt rail. 4. 5 amps (60 watts) for the mot