Will I lose data if I lose power to a RamSan?

No. All peripheral RamSan systems are equipped with redundant batteries and either backup hard disk drives (RamSan-300 and RamSan-400) or Flash modules (RamSan-440, RamSan-500, RamSan-620, and RamSan-20). When external power is lost, the batteries will power the system long enough to back up all data that is in memory to the internal hard disk drives or Flash modules. Both the backup hard disk drives and Flash modules are RAID protected, which means that even if a hard disk drive or Flash module fails, the other disk drives or Flash modules will be able to back up the system in the event of power outage.