What do you mean by RAID?Explain the importance and use of RAID briefly using images.Differentiate between RAID 0 and RAID 1?
Concept Of RAID And Difference Between RAID 0 And RAID 1
The full form of RAID is“redundant array of independent disks”. It is a typestorage technology that joins multiple disk drive parts into a single logical unit, so it works as one drive when connected to any other hardware. There are many differences between RAID 0 and RAID 1, but the key difference is that RAID 1 offers repetition through mirroring, i.e., data is written exactly same to two drives. RAID 0 gives no repetition and instead uses striping, i.e., data is different and divided across all the drives, which means RAID 0 provides no fault tolerance; if any of the drives fails, the RAID unit fails.
Concept Of RAID And Difference Between RAID 0 And RAID 1
RAID originally stands for “Redundant Array of Inexpensive Disks” but now it is commonly known as “Redundant Array of Independent Disks”. It offers a method of storing the same data in different locations, that’s why it is called redundant, on numerous hard drives.
RAID is a kind of data storage virtualization technology where numerous physical hard drives are put together to form a single logical unit for performance enhancement, data redundancy, or the combination of both. When you put data on multiple hard drives, input and output operations can overlap in a balanced way therefore improving the performance.
Data is distributed across the hard drives using one of the different methods known as RAID levels based on the required level of redundancy and performance. RAID 0 is the first standard RAID level where striping is applied but no redundancy of data is performed. This configuration provides the best performance but doesn’t offer fault tolerance. RAID 1 is the second standard RAID level.
This configuration is also known as “disk mirroring” and is composed of at least two hard drives that duplicate the storage of data. Striping is not present and read performance is enhanced because data can be read on either hard drives simultaneously. Fault tolerance is the property that allows a system to continue operating properly even if some of its components fail.
Disk striping or simply striping is the process of dividing or splitting a body of data into blocks and distributing them across multiple storage devices such as SSDs or IDE hard drives.
