Netgear RN422X124 – ReadyNAS 4220 2U 12-Bay 12x4TB Enterprise Drives w/ 2x 10GbE Hardware Manual

Install the heaviest components on the bottom of the rack first, and then work up.

Use a regulating uninterruptible power supply (UPS) to protect the ReadyNAS from power surges and
voltage spikes and to keep your system operating in case of a power failure.

Allow any hot-plug drives and power supply modules to cool before touching them.

Always keep the rack's front door and all panels and components on the servers closed when not
servicing them to maintain proper cooling.