A data storage method in which data, along with information used for error correction, such as parity bits, is distributed among two or more hard disk drives in order to improve performance and reliability. The hard disk array is governed by array management software and a disk controller, which handles the error correction. RAID is generally used on network servers. Several defined levels of RAID offer differing trade-offs among access speed, reliability, and cost. Windows includes three of the RAID levels: Level 0, Level 1, and Level 5.
A method of storing the same data in different places on multiple hard disks. The input/output operations can therefore overlap. RAID improves performance, increases the mean time between failure (MTBF), and increases fault tolerance.
A technology involving 2 or more hard disk s where the data is distributed based on reliability & performance.
A hardware architecture that combines multiple hard disk drives to allow rapid access to a large volume of stored data.
RAID (redundant array of independent disks; originally redundant array of inexpensive disks) is a way of storing the same data in different places (thus, redundantly) on multiple hard disks.
A project initiated at the computing science department of Berkeley University, in which the storage of data is spread along an array of disks using different schemes. At first, this was implemented using floppy drives, which is why the acronym originally stood for Redundant Array of Inexpensive Disks. RAM
A method used to standardize and categorize fault-tolerant disk systems. Six levels gauge various mixes of performance, reliability, and cost. Windows 2000 provides three of the RAID levels: Level 0 (striping) which is not fault-tolerant, Level 1 (mirroring), and Level 5 (striped volume with parity). See also fault tolerance; mirrored volume; RAID-5 volume; striped volume.
A collection of hard disk drives which are used collectively for faster performance and/or fault tolerance. There are different modes of RAID, like modes 0, 1, 0+1, and 5. These indicate that data stripping, duplication or parity calculations are being used. RAID was originally used exclusivity with SCSI, but new controllers for IDE are also capable of this functionality. This is for the most part only used in a server/workstation environment.
A feature of a controller designed to protect against hard drive failure or improve storage subsystem performance or both by making multiple hard drives act as a single hard drive.
A disk array in which part of the physical storage capacity is used to store redundant information about user data stored on the remainder of the storage capacity. The redundant information enables regeneration of user data in the event that one of the array¡¦s member disks or the access path to it fails.
A method used to standardize and categorize fault-tolerant disk systems. RAID levels provide various mixes of performance, reliability, and cost. Some servers provide three of the RAID levels: Level 0 (striping), Level 1 (mirroring), and Level 5 (RAID-5). See also: RAID-5 volume; fault tolerance; mirrored volume
