EUROLOGIC MAN-FC2000-RAID Guide de l'utilisateur télécharger pdf (Page 19)

Hardware Information

Battery Backup Unit

Board

A Battery Backup Unit (BBU) maintains memory content

in the event of an AC power failure. The main purpose of the

BBU is to provide AC power glitch ride-through, however,

the BBU is capable of sustaining memory content for an

extended period.

The BBU is designed to work with SDRAM memory, and

supports both the processor control store and ASIC cache

memory SDRAM. The BBU logic detects power loss on the

controller and switches the SDRAM to a self-refresh mode

while transparently switching the power input from +5V to

battery. The BBU can sustain memory content for at least 72

hours

under typical operating conditions.

1. This figure can be greater depending on the cache size.

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EUROLOGIC MAN-FC2000-RAID Guide de l'utilisateur Page 19