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EMC Disk-Array Processor Enclosure (DPE) Deskside Model FC4400/4500 Hardware Reference
Installing a Deskside DPE
Requirements
This section explains site, cabling, and addressing requirements.
Site Requirements
For proper DPE operation, the installation site must conform to
certain environmental specifications. These are detailed below and in
Appendix A.
Grounding
The deskside DPE is grounded through its power cord, as is the
server and other FC devices. If the DPE is configured for an FC-AL
environment using copper FC-AL cables, we suggest that all
interconnected devices on the loop be connected to a common
ground grid. Optical cables do not have these ground requirements.
Power
To determine a DPE’s power requirements, use the power rating on
the enclosure label. This rating is the maximum power required for a
fully loaded enclosure. The input current, power (VA), and
dissipation for the DPE are based on the maximum capability of the
power supplies and cooling system to provide internally regulated
power.
Typical values will be less depending on the number and
manufacturer of disk drives. These values represent either the values
for the power cord of a deskside DPE with a non-redundant single
power supply configuration and PDU, or the total values shared by
the power cords of redundant power supplies, with the division
between the power cords and supplies at the current sharing ratio. If
a redundant power supplies fails, the remaining supply(s) and
cord(s) support the full load.
Cooling
The ambient temperature specification is measured at the front door
inlet. The site must have air conditioning of the correct size and
placement to maintain the specified ambient temperature range. The
air conditioning must be able to handle the BTU requirements of the
deskside DPE.
Cabling Requirements
Use optical or copper cables for connections to the external Fibre
Channel environment. Use a copper cable only (not an optical cable)
to connect a DPE to a DAE.
DPE and DAE interconnections should maintain LCC consistency;
that is, one FC loop should connect the DPE’s SP A (which connects
internally to LCC A) and each DAE’s LCC A. The other FC loop
should connect the DPE’s SP B (which connects internally to LCC B)
