Greetings.
You can see the spec sheet at https://www.cisco.com/c/dam/en/us/products/collateral/servers-unified-computing/ucs-b-series-blade-servers/b200m4-specsheet.pdf
If you have an issue with the supercap/bbu, just open a TAC case.
The 12G-HE model you have will have much better performance that the 12Gb model.
Thanks,
Kirk...
Product ID (PID) PID Description
UCSB-MRAID12G2 Cisco FlexStorage 12G SAS RAID controller with drive bays
UCSB-MRAID12G-HE 3, 4, 5 Cisco FlexStorage 12G SAS RAID controller with 2 GB flash-backed write
cache with drive bays
Notes...
1. Cisco FlexStorage 12G SAS RAID controller (powered by the LSI SAS 3108 chip - see
http://www.lsi.com/products/raid-on-chip/pages/lsi-sas-3108.aspx) with drive bays, providing up to 12 Gbps
SAS connectivity, offering:
- SAS/SATA support
- RAID 0 and 1 and JBOD
2. The UCSB-MRAID-12G RAID controller runs iMegaRAID, which has a lower-capability software stack, provides
RAID 0/1 levels, and has no support for caching. Note that you cannot upgrade from this RAID controller to the
to UCSB-MRAID12G-HE RAID controller.
3. The UCSB-MRAID12G-HE RAID controller runs a MegaRAID fully-featured software stack, has access to cache,
and is recommended for VSAN. Its queue depth is much higher than that of the UCSB-MRAID-12G. Supports
RAID 0/1/5/6 levels. Note that you can implement either the UCSB-MRAID-12G RAID controller or the
UCSB-MRAID12G-HE RAID controller. However, if you are using a UCSB-MRAID-12G RAID controller, there is no
kit available that allows you to upgrade from the UCSB-MRAID-12G RAID controller to the UCSB-MRAID12G-HE
RAID controller. The only way to do that is to swap out controllers.
4. The flash-backed write cache provides RAID controller cache protection using NAND flash memory and a
supercapacitor. In the event of a power or server failure, cached data is automatically transferred from the
RAID controller DRAM write cache to flash. Once power is restored, the data in the NAND flash is copied back
into the DRAM write cache until it can be flushed to the disk drives
