RAID (Redundant Array of Independent Disks)
RAID, which stands for Redundant Array of Independent Disks, is a storage technology that combines multiple physical disk drives into a single logical unit to improve performance, improve reliability, or both. There are several RAID levels, each offering different configurations for redundancy and performance. RAID 1, for example, mirrors data across two or more drives, providing redundancy by duplicating data so that if one drive fails, data can still be retrieved from the other drive(s). RAID 5 distributes data and parity information across multiple drives, offering both redundancy and improved read performance, while RAID 0 stripes data across drives to improve performance but offers no redundancy. RAID technology is widely used in servers and storage systems where data availability and data integrity are critical, offering various trade-offs between performance, capacity, and redundancy to meet specific needs.