Knowledge Base; What Is Raid - D-Link ShareCenter DNS-345 User Manual

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Section 5 - Knowledge Base
RAID, short for Redundant Array of Independent Disks, is a combination of two or more disks with the aim of providing fault tolerance and
performance improvement. There are several different levels of RAID, with each one providing a different method of sharing or distributing data
amongst the drives. The DNS-345 supports JBOD, RAID 0, RAID 1, RAID 5, RAID 5 + Spare, RAID 10,and Standard.
RAID 0
RAID 0 provides data striping, which spreads out
blocks of data over all the 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.
D-Link ShareCenter DNS-345 User Manual

Knowledge Base

What is RAID?

RAID 1
RAID 1 provides mirroring over multiple 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 multiple disks,
RAID 1 provides fault tolerance and protection, in
addition to performance advantages.
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