Lacie 2big Quadra USB 3.0 User Manual - Page 20

ABOUT RAID MODES Refer to the table below for an overview of the different RAID modes, and see the descriptions for details. RAID Mode Capacity Protection Speed Factory Default RAID 0 (FAST) 100% None Excellent Yes RAID 1 (SAFE) 50% Excellent OK No RAID 0 (FAST): RAID 0, is the fastest RAID mode. In a RAID 0 array, the available capacities of each drive are added together so that one logical volume mounts on the computer. It offers the best performance but no protection in the case that a drive fails. Caution: In a RAID 0 array, if one physical drive in the array fails, the data of all drives becomes inaccessible because parts of the data have been written to all drives. RAID 1 (SAFE): RAID 1 provides data safety since all data is written to each drive at the same time. In the event of a single drive failure, data remains available on the other drive. Due to the time it takes to write the data twice, performance is slightly reduced. RAID 1 is a good choice when safety is more important than speed. However RAID 1 also reduces the available drive space by 50% due to the need to write each bit of data on each hard drive. LaCie 2big Quadra USB 3.0 User Manual 20