Intel® RAID Adapters RSP3TD160, RSP3MD088, RSP3DD080 and RSP3WD080 Hardware User Guide
15
XON/XOFF flow control.
2.12
Optional Intel® RAID Maintenance Free Backup Unit (RMFBU)
To protect the integrity of cached data on the Intel® RAID Module during a power loss event, the Intel Tri-Mode
Adapter RMSP3TD160F and RMSP3DD080F provide support for the Intel® Maintenance Free Backup Unit
(RMFBU – Intel Accessory Kit
AXXRMFBU7
). During a power loss event, this optional accessory provides
back-up power to the RAID Module, allowing the adapter to offload the data stored in the its onboard cache
to its on-board non-volatile NAND flash.
Benefits of the RMFBU option include:
•
Capacitor technology has a longer usable life span than batteries, and reduces maintenance and
replacement costs
•
Capacitors do not have the chemical volatility of batteries which carry a risk of exothermic events
•
RMFBU options do not require the comprehensive certifications required of batteries in order to import and
export them
•
The RMFBU can constantly maintain the RAID volume in write back mode even when doing learn cycles
•
The recharge rate of the super-capacitor is minutes as compared to hours for a battery
See Chapter 7 for additional RMFBU information.
