raid controller before buy  a new one) HighPoint RocketRAID 2300 3ware 9650SE-4LPML PROMISE SuperTrak EX8350 RTL Areca ARC-1220 RAID 0 (block-level striping without parity or mirroring ) provides improved performance and additional storage but no redundancy or fault tolerance (making it not true RAID, according to the acronym's definition). In RAID