RAID 5 is the most popular secure RAID level. With RAID 1, you must purchase double the amount of storage space that your data requires. If one of the disks fails, all data is still safe on others. This means that when you write a file, the file is actually written to multiple disks. RAID 1 uses mirroring to write data to multiple drives. If one drive fails, all data in the RAID 0 array are lost. This means that when you write a 5GB file across 5 drives, 1GB of data is written to each drive.īy using multiple disks (at least 2) at the same time, this offers superior read and write performance. However, it is not fault-tolerant. RAID 0 uses striping to write data randomly to multiple disks.
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