RAID can be defined as Redundant Array of Independent Disks. originally redundant array of inexpensive disks. RAID Hard Drive Arrays consists of several hard disks that connect in parallel. This technology could protect data through fault tolerance. The purpose is that enhance the capacity and storage performance. RAID can be explained as JBOD(just bunch of disks). This essay will overview 4 common RAID configurations.
RAID 0:
RAID 0 use minimum of 2 disks. Also called striping. Data be divided into blocks. At the same time the first, third, fifth and so on be stored into disk A. On the other hand, the second, fourth, sixth and so on be stored into disk B.
As far as advantages are considered, RAID 0 can be the most sample storage configuration.…show more content… The main disadvantage is that the configuration of RAID 0 store data without fault tolerance. If one disk fail, it may cause loss all of data. Furthermore, it is difficult to recover the data when one of RAID 0 disk fail.
When and where if RAID 0 use? Generally speaking, it is used in video editing station or image retouching as it is just focus on read and write data speed and do not care the importance of data storage.
RAID 1: RAID 1 aka mirroring disks. It need at least 2 disks. In case RAID 1 configuration, data be stored with fault tolerance. One disk be used in storage, another disk be used in data backup. If one disk failed, the other can keep executing.
In terms of advantages, RAID 1 is better than RAID 0. For instance, RAID 1 provides fast read speed. RAID 1 offers the reliability of data storage. If one disk failed, the data is very easy to recovery.The technology is sample.
What the disadvantage is that RAID 1 provides slower write speed than RAID 0. Because the write command is duplicated. In addition, Only half capacity can be used.
When and where use RAID 1? RAID 1 prefer to store critical data. For example bank, government and so on.
