Power Supply Expansion - Hitachi COMPUTE BLADE 500 SERIES Management Module Setup Manual

3 Operation status 3 (Suppressing the maximum power consumption)
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Power supply expansion

The power supply expansion function expands the usable power by using
surplus power of redundant power systems when active and redundant
systems are in normal operation. The function eases the restriction for
installing number of blades and performance suppression by power capping
on the blade.
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Functional detail
Hitachi Compute Blade 500 Series Management Module Setup Guide