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    • https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/When_does_DS4246_need_four_PSUs
      Number of power supplies shipped in a DS4243 disk shelf The type of the disk drives used in DS4243 disk shelves determines the number of power suppliesrequired to ensure proper cooling, airflow, and p...Number of power supplies shipped in a DS4243 disk shelf The type of the disk drives used in DS4243 disk shelves determines the number of power suppliesrequired to ensure proper cooling, airflow, and power. • DS4243 disk shelves that have solid-state disks (SSDs), or disk drives that are slower than10,000 RPM, require two power supplies and two power supply blanks to fill the four powersupply bays in the disk shelf.These disk shelves require two power outlets. • DS4243 disk shelves that have dis…