RAID
RAID (Redundant Array of Independent Disks) is a data storage virtualization technology that combines multiple physical disk drives into one or more logical units for data redundancy, performance improvement, or both. It distributes data across drives using different methods called RAID levels, such as mirroring, striping, or parity, to protect against drive failures and enhance read/write speeds. This technology is widely used in servers, NAS devices, and enterprise storage systems to ensure data availability and reliability.
Developers should learn RAID when working with systems requiring high data availability, fault tolerance, or improved I/O performance, such as database servers, file servers, or backup solutions. It's essential for designing storage architectures in data centers, cloud infrastructure, or any environment where disk failures could lead to data loss or downtime. Understanding RAID helps in selecting appropriate levels (e.g., RAID 1 for mirroring, RAID 5 for parity) based on specific needs like redundancy, capacity, or cost.