Avastor XD5, Руководство пользователя

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VER 1.0 15
DISKS SUPPORTING RAID CONFIGURATION
RAID configurations
Number of Disks in
RAID
RAID 0 1 to 5
RAID 1 2
RAID 10 4
RAID 3 3 to 5
RAID 5 3 to 5
Clear RAID 1 to 5
RAID CONFIGURATIONS
A Redundant Array of Independent Disks (RAID) is a system that utilizes multiple
hard drives to share or replicate data among the disks. The benefit, depending
on the selected RAID configuration (combinations of disks), is one of increased
data integrity, fault-tolerance, throughput or capacity, when compared to single
drives.
RAID 0
RAID 0 - also known as Striping, is a performance-oriented, non-redundant data
mapping technique. It combines multiple hard drives into a single logical unit.
Instead of seeing several different hard drives, the operating system sees only
one large drive. RAID 0 strips or splits data across two disks simultaneously; the
speed of operation is enhanced compared to other RAID configurations.
RAID 0 is used by those wanting the most performance out of two or more
drives. Users commonly use RAID 0 for quick data transfers from one source to
another. A backup of the data should always be maintained.
RAID 0 should never be used for mission critical applications, if one disk fails all
data on all installed disks will be lost.
RAID 1
RAID 1 - also known as Mirroring, consists of two drives storing duplicate copies
of the same data. In this mode, the same data is simultaneously written to two
drives. Thus, the storage capacity of a two-drive array is combined into a single
drive and the capacity is limited to the size of the smallest drive or half the
capacity if the two drives are the same size.
Uses include removing one of the mirrored drives and allowing the array to
rebuild on a third drive. If a drive fails, there is no down time, as the data still