To convert a price from dollars per gallon to dollars per DGE, multiply the price per gallon of the alternative fuel by the conversion factor. Conversion factor to DGE CNG (in GGE) 1.12 Ethanol (E85) 1.58 Propane 1.54 Biodiesel (B20) 1.02 Biodiesel (B100) 1.10.
What is the purpose to use BBU with Raid controller. The BBU (battery backup unit) provides power to the RAID controller during an unexpected power off. It will maintain cache data that has not been written to disk. It will supply 24+ hours of power to the cache on the RAID controller. Backups from a RAID array are usually handled on an external USB drive or network storage.
RAID groups can contain single or multiple parity groups. You can think of the RAID group as the actual RAID container for data protection, and the parity group as a partition of that container. This way, multiple LUNs can be created from each RAID group, and ported out to the same or different servers. This allows granularity in LUN sizes being obtained from the RAID group. If each partition (parity group) is assigned to the same server, there should be no contention for the RAID group's disk resources.