DS8000 Service Documentation Version 7.5

Checking customer preparations

Before you begin

DANGER
HEAVY EQUIPMENT -- PERSONAL INJURY OR EQUIPMENT DAMAGE MAY RESULT IF MISHANDLED (D006)

Procedure

  1. Verify that the customer has two AC power sources for each rack in the storage facility.

    For maximum fault tolerance, use two separate AC power sources.

    Note: The storage facility is designed for connection to an IT power distribution system. In an IT power distribution system, the neutral conductor is isolated from earth (ground) by an impedance with exposed conductive parts in the installation that is tied directly to earth.

    No service representative action is needed. Information is for compliance with International Electrotechnical Commission Standard 950 for the safety of information technology equipment and electrical business equipment.

  2. Verify the customer wall circuit breaker. The customer wall circuit breaker rating that protects each line cord depends on the voltage range as follows:
    • Low-voltage, three-phase installations (200 - 240 V) require wall circuit breakers that have a rating of 50 to 60 A. Do not exceed the wire rating of the facility.
    • High-voltage, three-phase installations (380 - 480 V) require wall circuit breakers that have a rating of 30 to 35 A. Do not exceed the wire rating of the facility.
  3. If the storage facility will be installed on a raised floor:
    1. The maximum rack weight is 2880 pounds (1307 kilograms). Have the customer verify their floor has adequate support.
      Note: For details on the rack weights, refer to IBM® DS8870 Introduction and Planning Guide.
    2. To correctly cool a rack, place two floor tiles with air flow holes directly in the front of each rack.
    3. If the rack does not have features for overhead cable management of power or host cables, or both, place the appropriate floor cutouts under the rear tailgate.
    4. If the rack does have features for overhead cable management, floor cutouts are not required in the following cases.
    • Rack 1, Rack 2:
      • Rack has feature 1400 (top exit bracket for fibre cable), AND
      • Rack has a top exit line cord feature (1070, 1071, 1095, 1096 or 1097), AND
      • Customer wants the PCIe and SPCN cables routed under the racks and on top of the raised floor
    • Rack 3 or Rack 4:
      • Rack has a top exit line cord feature (1070, 1071, 1095, 1096 or 1097)
  4. If the storage facility will not be installed on a raised floor, ensure the customer will provide adequate air flow and temperature around the storage facility.
    Notes:
    • For information about the temperature requirements of the operating environment, see the IBM System Storage DS8000 Introduction and Planning Guide. The PDF is also available on the IBM System Storage DS8000 series Service Documents CDROM.
    • The rack cooling airflow enters through the front cover and exits through the rear cover. The bottom of the DS8000 is sealed.
  5. If you are installing a Rack-2 and it contains host adapter cards in the I/O enclosures at the bottom of the rack, ensure the customer has ordered, supplied, and routed the following cables to the storage facility being installed. Routing of the customer cables must not be billed against the installation. If the customer wants the service representative to route the cables, that activity must be coded or billed separately.
    1. Fibre-Channel host cables from the host to the storage facility host adapters.