What Is Raid - D-Link ShareCenter Pulse DNS-320 User Manual

D-Link ShareCenter Pulse User Manual

What is RAID?

RAID, short for Redundant Array of Independent Disks, is a combination of two or more disks with the aim of providing fault tolerance and improving performance. There are
several different levels of RAID, with each providing a different method of sharing or distributing data amongst the drives. The ShareCenter Pulse supports RAID levels 0 and
1.
RAID 0
RAID 0 provides data striping, which spreads out blocks of data over both drives, but does not provide data redundancy. Although performance is improved, the lack of fault
tolerance means that if one drive fails, all data in the array will be lost.
RAID 1
RAID 1 provides mirroring over both disks, with the same read/write speed of a single disk. A RAID 1 array can only be as large as it's smallest member disk. Because the
data is stored on both disks, RAID 1 provides fault tolerance and protection, in addition to performance advantages.
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