Rack Configuration Planning
5-1
Chapter 5
Rack Configuration Planning
5-
For information about planning a rack configuration, see:
“Determining PDU Requirements” on page 5-2
“Example of PDU Usage Calculation” on page 5-4
Using PDUs
ftServer systems have two power receptacles. Correspondingly, two power distribution
units (PDUs) provide power to the receptacles.
Use of PDUs is optional unless you have a support agreement with Stratus. If you do
have a support agreement with Stratus, use pairs of PDUs to provide AC power to
systems and components in a cabinet
if six or more power cords would otherwise
exit from the cabinet
.
The A-side (top) PDU provides power to:
The A-side of each system
The A-side of a storage enclosure
Any rack-mounted tape drives
The B-side (bottom) PDU provides power to the other side of each system and to the
B-side of a storage enclosure.
Because the A-side PDU always uses at least as many power cords and consumes at
least as much power as the B-side PDU, plan the cabinet configuration so that the
A-side PDU can support the configuration.
N O T E S
1. Connect each PDU to a separate AC power source.
2. Install a maximum of two pairs of PDUs in a rack.
