Recently i heared a mothed from a friend, two hard drives can made RAID, what is RAID? What conditions need to achieve this functionality?
A: RAID, is a short of Redundant Arrays of Independent Disks,. The purpose of RAID is stored the same information in many different places on the hard disk, and improve storage subsystem performance. RAID level has already started the development of six levels from the introduction of the RAID concept to the present, namely 0,1,2,3,4,5 and so on. But the most commonly used is RAID0, RAID1.
RAID0: multiple smaller disks into a single large disk, parallel I / O, the fastest. It will tie together multiple disks into a large hard drive. However, there is no redundancy RAID 0, if a disk (physical) damage, all of the data are not available.
RAID1: two each for the same mirror disk system, the speed did not increase, but allows a single disk error, the highest reliability. RAID 1 store data on the main hard disk and also writing the same data on the hard disk image. When the primary hard drive (physical) damaged, the mirror instead the primary hard drive working.
