Intel
®
RAID Maintenance Free Backup Unit AXXRMFBU2
User’s Guide
11
4 RAID Maintenance Free Backup Unit
Specifications
MegaRAID CacheVault
TM
Technology
LSI* MegaRAID CacheVault
TM
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
-40°C to 55°C
SuperCap2 Storage Temperature
-40°C to 70°C
Fast Charge Rate
500 mA
SuperCap2 Voltage
Nominal Voltage: 13.2 V
SuperCap2 Capacity
6.8 F
SuperCap2 Mechanical
65 mm x 52 mm
RMFBU2 Mechanical
87 mm x 57 mm
SuperCap2 Charge Time
Typical: Approximate 2 minutes
RMFBU2 Shelf Life
3 years
RMFBU2 Operational Life
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 I2C interface.
