IBM DCS3860, Инструкция по установке, использованию и обслуживанию

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Power and site wiring requirements for models with power
supply and fan units
The storage expansion enclosure uses wide-ranging redundant power supplies that
automatically accommodate voltages to the power source. The power supplies
operate within the ranges specified in Table 13 on page 21. The power supplies
meet standard voltage requirements for both domestic (inside USA) and
international (outside USA) operations. They use standard industrial wiring with
line-to-neutral or line-to-line power connections.
The agency voltage and current ratings for the DCS3860 storage expansion
enclosure are 200 V
AC - 240 V AC and 7.79 A - 7.64 A.
Power recovery after a power failure: After normal power is restored, the storage
expansion enclosure performs power-up recovery procedures automatically
without operator intervention.
Power cords and receptacles: The DCS3860 ships with either two IEC C19 to C14
jumper cords or two IEC C19 to C20 jumper cords. The C19 plug connects to the
DCS3860 power supply and the other end is used to connect to the rack PDU
outlets. It is not shipped with the power cords that can be used to connect it
directly to an electrical outlet in the destination country. You must purchase the
power cords that are appropriate for use in a typical outlet in the destination
country. See Chapter 10, “Power cords,” on page 157 for more information.
Heat output, airflow, and cooling
The system has a hot aisle and cold aisle requirement for disk system reliability.
See “Airflow and heat dissipation” on page 19 for heat output, airflow, and cooling
specifications.
Note: In general, disk system reliability tends to decrease as the ambient
temperature of the environment in which it is being used increases.
When racks that contain many storage expansion enclosures are to be installed
together, the following requirements must be met to ensure that the storage
expansion enclosures are adequately cooled:
v
Air enters at the front of the rack and leaves at the back. To prevent the air that
is leaving the rack from entering the intake of another piece of equipment, you
must position the racks in alternate rows, back-to-back, and front-to-front. This
arrangement is known as
cold aisle and hot aisle and is shown in Figure 12 on
page 23.
v
Where racks are in rows, each rack must touch the rack that is next to it to
reduce the amount of hot air that can flow around from the back of the rack into
the intakes of the storage expansion enclosures that are in that rack. You must
use Suite Attach Kits to completely seal any gaps that remain between the racks.
For details about Suite Attach Kits, contact your marketing representative.
v Where racks are in rows front-to-front or back-to-back, a gap of at least 1220 mm
(48 in.) must separate the rows across the cold aisle.
v
To ensure correct airflow in each rack, the rack filler plates must be installed in
unused positions. Also, all the gaps in the front of the racks must be sealed,
including the gaps between the storage expansion enclosures.
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IBM System Storage DCS3860 Storage System: Installation, User's, and Maintenance Guide