User`s guide

Installation 31
Installation
Preparation
Before installing the disk system, make sure (1) electrical wiring, breakers, and
PDUs meet power needs, (2) the required support software is installed on the
host, and (3) if you are connecting the disk system to a V-class server, auto-
termination is enabled on the host bus adapter. This section covers all three of
these topics.
Electrical Requirements
All electrical wiring to the service point (plug) must be sized to carry the
appropriate inrush (20 amps per power supply) and steady state currents. See the
following table for examples.
Table 1. Inrush (Surge) Current and Duration
No. of Disk Systems on Circuit
(2 power supplies per disk
system)
Inrush Current and Duration
1 40 amps declining over 100 ms (5 cycles)
2 80 amps declining over 100 ms (5 cycles)
3 120 amps declining over 100 ms (5 cycles)
4 160 amps declining over 100 ms (5 cycles)
2