Several physical disc drive components are combined into one or more logical units using the data storage virtualization technology known as RAID for the goals of data redundancy, performance enhancement, or both.
A technique for mirroring or stripping data across numerous low-end disc drives; this improves mean time between failures, throughput, and error correction by copying data across multiple drives.
The ability of some types of RAID arrays to withstand numerous disc failures is referred to as RAID redundancy. To reduce the risk of data loss due to disc failure, RAID redundancy employs redundancy techniques such as data mirroring, data striping, and parity.
The Global Redundant Array of Independent Disks (RAID) Market accounted for $XX Billion in 2022 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2023 to 2030.
In order to protect data in the event of a drive failure, RAID (redundant array of independent discs) stores the same data in various locations on numerous hard discs or solid-state drives (SSDs). However not all RAID levels aim to provide redundancy; there are several RAID levels.
Data is spread across several drives with RAID, which allows input/output (I/O) activities to overlap in a balanced way for better performance.
Data storage in redundant copies boosts fault tolerance because employing many drives extends the average time between failures.The operating system (OS) sees RAID arrays as a single logical drive.
Disk striping or disc mirroring are methods used in RAID. Mirroring will duplicate data across multiple drives. Data is distributed across numerous disc drives with the aid of striping partitions.
The storage capacity of each drive is divided into blocks that range in size from a sector with 512 bytes to several megabytes. All of the discs’ stripes are interspersed and addressed sequentially. A RAID array can also combine disc striping and disc mirroring.
Hard disc drives in a storage array are managed by a RAID controller. By displaying collections of discs as logical units, it can serve as a layer of abstraction between the operating system and actual discs.
Performance can be enhanced and data can be protected in case of a crash by using a RAID controller. A RAID controller could be based on software or hardware. In a hardware-based RAID device, the entire array is controlled by a physical controller.
Along with supporting drive formats like Serial Advanced Technology Attachment and Tiny Computer System Interface, the controller can also be built to support those. The motherboard of a server can also contain a hardware RAID controller.
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