Avastor XD5 Manuel de l'utilisateur - Page 15

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DISKS SUPPORTING RAID CONFIGURATION

RAID 0

RAID 10

RAID 3

RAID 5

Clear RAID

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

Number of Disks in

RAID

1 to 5

3 to 5

1 to 5

VER 1.0