Users Guide

4 RAID Maintenance Free Backup Unit

Specifications

MegaRAID CacheVault

Technology

LSI* MegaRAID CacheVault

flash cache protection uses NAND flash memory powered by a super-

capacitor to protect data stored in the MegaRAID controller cache. This module eliminates the need for a

lithium ion battery traditionally used to protect DRAM cache memory on PCI RAID controllers. The

RAID controller automatically writes the data in cache to flash when a power failure occurs, while the

super-capacitor keeps the current going during the process. When the power comes back, the DRAM is

recovered from flash and the system goes on without loss of data. The benefits of this technology are

elimination of hardware maintenance associated with LiON batteries, lower total cost of ownership over

the life of the adapter, and more environmentally friendly cache protection.

Table 2. RMFBU2 Specifications

Specifications RMFBU2

SuperCap2 Operating Environment 0°C to 55°C

SuperCap2 Storage Temperature 0°C to 70°C

Fast Charge Rate 500 mA

SuperCap2 Voltage

Maximum Voltage: 13.2 V

Nominal Voltage: 9.5 V

SuperCap2 Capacity 6.4 F (where F is the unit Farad)

SuperCap2 Mechanical 65 mm x 52 mm

RMFBU2 Mechanical 87 mm x 57 mm

SuperCap2 Charge Time Typical: Approximately two minutes

RMFBU2 Shelf Life Two years

RMFBU2 Warranty

Intel

provides a three year warranty on the Intel

RAID Maintenance Free Backup Unit

AXXRMFBU2.

RMFBU2 Cache-offload Module Capacity 2 GB NAND Flash

Smart Monitoring Temperature is monitored using the I

C interface.

Intel

RAID Maintenance Free Backup Unit AXXRMFBU2 User’s Guide 11