Broadcom CacheVault-05-UG101
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LSIiBBU and CFVM01 User Guide Cache Backup Products
The only functional difference between an iBBU and an iTBBU is that the iTBBU mounts on the DIMM itself and can be
transferred onto a new MegaRAID card without compromising cache integrity.
1.1.3 CacheVault Modules
CacheVault technology consist of two primary items. The CacheVault power module (CVPM) is an ultracapacitor based
energy source that powers the critical adapter components in the event of a power loss, long enough to offload cached data
to the nonvolatile flash memory on the CacheVault flash module (CVFM). The DRAM contents are restored to the CVFM the
next time the MegaRAID controller is powered and the cached data is written to the storage devices. The CVPM is also
sometimes referred to as a supercapacitor or flash backup unit (FBU).
CacheVault flash technology virtually eliminates the hardware maintenance associated with batteries, offers lower total cost
of ownership over the life of the controller, and provides more environmentally friendly cache protection, all while maintaining
optimal RAID performance.
1.2 MegaRAID Battery Backup Units Matrix
Broadcom offers several battery designs in the MegaRAID controller family. The following table shows which MegaRAID
controllers use each iBBU model and how they connect.
Table 1 MegaRAID BBU Matrix
BBU Product Name Description Supported MegaRAID Controllers and Connection Option
LSIiBBU01 (Nickel
Metal Hydride [NiMH])
iBBU, NiMH technology. MegaRAID SAS 8888ELP (Remote connect option)
LSIiBBU01 (Lithium
ion [LiON])
iBBU, LiON technology.
Compatible with a backup
auxiliary power source.
MegaRAID SAS 8308ELP (Remote connect option)
MegaRAID SAS 8344ELP (Remote connect option)
MegaRAID SAS 84016E (Remote connect option)
LSIiTBBU03 iTBBU, miniDIMM, LiON
technology.
MegaRAID SAS 8888ELP (Daughtercard)
LSIiBBU05 (NiMH) iBBU, NiMH technology.
Compatible with a backup
auxiliary power source.
MegaRAID SAS 8704ELP (Daughtercard)
MegaRAID SAS 8708ELP (Daughtercard, no auxiliary power capability)
MegaRAID SAS 8708E (Daughtercard)
MegaRAID SAS 8888ELP (Remote connect option)
LSIiBBU05 (LiON) iBBU, LiON technology.
Compatible with a backup
auxiliary power source.
MegaRAID SAS 8704ELP (Daughtercard)
MegaRAID SAS 8708ELP (Daughtercard, no auxiliary power capability)
MegaRAID SAS 8708E (Daughtercard)
MegaRAID SAS 8888ELP (Remote connect option)
MegaRAID SAS 8704EM2 (Remote connect option)
LSIiBBU06 iBBU, LiON technology.
Compatible with a backup
auxiliary power source.
MegaRAID SAS 8708EM2 (Daughtercard or remote connect option)
MegaRAID SAS 8704EM2 (Remote connect option)
LSIiBBU07 iBBU, LiON Lithium Polymer Cell
technology. Compatible with a
backup auxiliary power source.
MegaRAID SAS 8880EM2 (Daughtercard or remote connect option)
MegaRAID SAS 9260-4i (Daughtercard)
MegaRAID SAS 9260-8i (Daughtercard)
MegaRAID SAS 9260DE-8i (Daughtercard)
MegaRAID SAS 9261-8i (Daughtercard or remote connect option)
MegaRAID SAS 9280-4i4e (Daughtercard or remote connect option)
MegaRAID SAS 9280-8e (Daughtercard or remote connect option)
MegaRAID SAS 9280DE-8e (Daughtercard or remote connect option)