Which level of RAID is commonly referred to as disk mirroring?
A.
RAID 5
B.
RAID 1
C.
RAID 3
D.
RAID 0
Explanation:
Redundant Array of Inexpensive Disks (RAID) is a method ofenhancing hard disk fault tolerance, which can improve performance
(see Table A.8). RAID 1 maintains a complete copy of all data by
duplicating each hard drive. Performance can suffer in some implementations
of RAID 1, and twice as many drives are required. Novell
developed a type of disk mirroring called disk duplexing, which uses
multiple disk controller cards increasing both performance and reliability.*RAID 0, gives some performance gains by striping
the data across multiple drives, but reduces fault tolerance, as the
failure of any single drive disables the whole volume.
* RAID 3, uses a dedicated error-correction disk called a parity drive,
and stripes the data across the other data drives.
* RAID 5 uses all disks in the array for both data and error correction, increasing
both storage capacity and performance.
