Storage controllers are equipped with redundant hot-swappable power supplies. If a power supply fails and you do not have a replacement, leave the failed power supply installed to ensure proper air flow. A faulted power supply is indicated by an amber-colored status LED. Use the following procedure to replace a 7x20 power supply.
7120 or 7320: Release the latch, then remove the power supply. Components may differ slightly between the 7120 and 7320, however service procedures for each are identical. The illustration shows the 7320 controller.
7420: Grasp the power supply handle and press the release latch to remove the power supply.