Why RAID 10 ?
RAID is an acronym for Redundant Array of Independent (or Inexpensive) Disks. It is a method of storing information on multiple hard disks for greater protection and/or performance. There are several different storage methods, named levels, numbered from 0 to 9.
RAID 10, is a combination of levels 1 (mirroring) and 0 (striping), which is why it is also sometimes identified as RAID 1 + 0. Mirroring is writing data to two or more hard drive disks (HDDs) at the same time – if one disk fails, the mirror image preserves the data from the failed disk. Striping breaks data into “chunks” that are written in succession to different disks. This improves performance because your computer can access data from more than one disk simultaneously.