Placement in the Rack

Note the following when installing the ETERNUS DX in the rack.

  • The center of gravity must be taken into consideration to prevent a rack from toppling over. Enclosures should generally be installed from bottom to top to lower the center of gravity and to ensure the safe use of racks.

  • Enclosures are installed in the following order (from bottom to top).

    Table: Enclosure Installation Order

    Installation order

    Enclosure

    Size (height)

    5-3

    3.5" SAS type drive enclosure

    2U

    5-2

    2.5" SAS type drive enclosure

    2U

    5-1

    2.5" NVMe type drive enclosure

    2U

    3

    Controller enclosure

    3U

    3

    Frontend enclosure (ETERNUS DX900 S6 and ETERNUS DX8900 S6)

    5U

    2

    Power distribution unit

    1U × 2

    1

    UPS (*1)

    —
    *1 : 

    This is an Uninterruptible Power Supply.
Note

  • When determining the rack-mounting layout of each enclosure and power distribution unit, consider the length of each cord. For example, if the ETERNUS DX is installed at the top of a 2000mm rack and a 4m power cord is used, the surplus length of the power cord at the bottom of a rack should be about 2m.

  • If the ETERNUS DX is installed at the bottom of a rack, a space for the surplus of cables may not be available in some racks, preventing the ETERNUS DX from being pulled out when maintenance work is required.

    Secure a space of 1U or more at the bottom when installing an ETERNUS DX.

  • Install each enclosure starting from 8U.

  • If drive enclosures are to be added in the future, securing sufficient space for power distribution units in the bottom of the rack is recommended.

  • For 19-inch racks, install the power distribution unit (AC200V) in the lower part of the rack.

  • For the ETERNUS DX8900 S6, install the power distribution unit in the front of the rack in 2U to 3U, and install the second and subsequent units in the back of the rack in 2U to 7U.