Give an example of an environment or an application that bes

Give an example of an environment or an application that best matches the characteristics of each of the following RAID levels:

a. RAID Level 0
b. RAID Level 1
c. RAID Level 3
d. RAID Level 5
e. RAID Level 6

Solution

a. RAID Level 0: It has striping but no redundancy of data and it has best performance in either read or write operations. RAID 0 is used for non-critical storage of data that have to be read or written at a high speed, such as on an image retouching or video editing station.

b. RAID Level 1: It is known as disk mirroring, Data are stored twice by writing them to together with the data drive and a mirror drive. If a drive be unsuccessfull, the controller uses data drive or the mirror drive for data recovery and keep on operation. RAID-1 is used for mission critical storage, for example accounting systems. It is also appropriate for small servers in which only two data drives will be used.

c. RAID Level 3: RAID 3 is basically like RAID 5 but with the parity data always written to the same drive. This technique uses striping and offers one drive to storing parity information. RAID 3 is best for single-user systems with long record applications.

d. RAID Level 5: This level is based on block-level striping with parity. RAID 5 requires at least three disks, but it can work by up to 16. Data blocks are striped across the drives and on one drive a parity checksum of all the block data is written. RAID 5 is a good all-round system that combines efficient storage with admirable security and polite performance. It is used for file and application servers that have a limited number of data drives.

e. RAID Level 6: RAID 6 is similar to RAID 5, but the parity data are written to two drives. That means it requires at least 4 drives and can survive 2 drives dying simultaneously. RAID 6 is a good all-round system that joins efficient storage with excellent security and decent performance. It is favorable over RAID 5 in file and application servers that use many huge drives for data storage.