Data and Parity Storing Techniques:A Survey

RAID is a data storage virtualization technology that combines multiple disk drive components into a logical unit for the purpose of data redundancy or for the performance improvement. Data is distributed across the drives in several ways which is referred to as RAID levels, depending on the specific level of redundancy and performance requirement. Solid-state drive RAID is a strategy for improving performance that involves dividing and storing the same data on multiple solid state drives.A group of solid-state drives (SSDs) are connected together to create a redundant array of independent disks (RAID). An operating system sees the RAID as one large disk, but since read and write operations are being spread out over multiple disks, inputs/outputs (I/Os) can be carried out simultaneously, so that performance speed can be improved. In this paper we will discusss about various method by which data can be moved to and from other storage devices and how they overcomes the problem that occur when we store data in disk drives.