Installing An Optional Fbu; Features; Installation - Fujitsu RAID 0/1 SAS based on LSI MegaRAID User Manual

Modular RAID 12Gb/s (SAS3.0)
5.6.5

Installing an optional FBU

5.6.5.1

Features

Using the LSI MegaRAID® CacheVault™ Technology offers better protection
for controller cache with our eco-friendly, low-maintenance LSI MegaRAID
based controllers featuring CacheVault Technology.
This technology offloads data stored in the LSI MegaRAID based controller
cache to the NAND flash in the event of a power failure or other system
occurrence where the contents of controller cache are most at risk.
In addition, CacheVault technology eliminates the need for lithium ion (Li-ion)
batteries, traditionally used to protect DRAM cache memory on PCI RAID
controllers.
CacheVault technology offers:
CacheVault technology transfers the contents of the DRAM cache to NAND
flash using power from the supercap module in the event of a power or server
failure. With a traditional battery backup unit, after a limited time without
restored power, the cached data is lost. However, CacheVault technology safely
stores the contents of DRAM on NAND flash for up to three years.
5.6.5.2

Installation

The FBU supports remote connection to the RAID controller "PRAID EP440i".
The FBU is not installed directly on the RAID controller. Instead, use one of the
supplied cables to connect the FBU to the TFM on the RAID controller. The FBU
must be mounted inside the chassis.
Because server chassis vary, there is no standard mounting option that is
compatible with all the different system configurations. Refer to your server's
Upgrade and Maintenance Manual for mounting details. Therefore, the FBU kit
contains only the cache unit and a set of cables, allowing you to customize the
location of the remote FBU to provide the most flexibility within different
environments. In newer chassis models Fujitsu offers mounting options using
the common holder technology. Using the common holder technology facilitates
mounting the FBU into the chassis.
When removing / connecting the FBU from / to the TFM, remove AC power from
your system.
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Modular RAID Controllers