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Why use
RAID?
Typically the RAID is used in large file servers,
transaction of application servers, where data accessibility is
critical, and fault tolerance is required. Nowadays, RAID is also being
used in desktop systems for CAD, multimedia editing and playback where
higher transfer rates are needed.
Secure
Data
RAID is an emerging storage technology with the
potential to revolutionalize the data storage technology. A typical RAID
unit contains a set of disk drives, typically two to six, which appear
to the user to be equivalent to a single large capacity disk drive. The
remarkable benefit of disk array is that if any single disk in the RAID
fails, the system and array still continues to function without loss of
data. This is possible because the redundancy data is stored on seperate
disk drives and the RAID can reconstruct the data that was storred on
the failed disk drive.
Increases system performance
As the effective seek time for finding data on a disk
can potentially be reduced by allowing multiple simultaneous access of
different data on different disks. Utilizing parallel reads and writes
of the data spread across the disks in the array, the data transfer rate
can be increased significantly over that of a single disk. |
