IBM TotalStorage SAN Volume Controller, Installation Manual

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Chapter 2. Overview of the uninterruptible power supply
This chapter describes the uninterruptible power supply and all of its components.
Related reference
“Controls and indicators for the uninterruptible power supply 5115” on page 19
All controls for the uninterruptible power supply 5115 are located on the front
panel assembly.
“Controls and indicators for the uninterruptible power supply 5125” on page 22
All controls for the uninterruptible power supply 5125 are located on the front
panel assembly.
“Hardware for the uninterruptible power supply 5115” on page 25
Diagrams of the hardware for the uninterruptible power supply (UPS) 5115 are
shown below:
“Hardware for the uninterruptible power supply 5125” on page 26
Diagrams of the hardware for the uninterruptible power supply (UPS) 5125 are
shown below:
“Preparing your uninterruptible power supply environment” on page 30
Ensure that your physical site meets the installation requirements for the
uninterruptible power supply (UPS).
Uninterruptible power supply overview
The uninterruptible power supply (UPS) provides the SAN Volume Controller with a
secondary power source to be used if you lose power from your primary power
source due to power failures, power sags, power surges, or line noise. Two types of
UPS units can be used with the SAN Volume Controller: the UPS 5115 and the
UPS 5125.
If a power outage occurs, the UPS maintains power long enough to save any
configuration and cache data contained in the dynamic random access memory
(DRAM). The data is saved to the SAN Volume Controller internal disk. Figure 6 on
page 16 and Figure 7 on page 16 provide illustrations of the two types of UPS
units.
© Copyright IBM Corp. 2003, 2005
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