D-Link DNS-320 Product Manual - Page 101

Knowledge Base, What is RAID?

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Section 5 - Knowledge Base Knowledge Base 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 one providing a different method of sharing or distributing data among the drives. The device supports JBOD, RAID 0, RAID 1, and Standalone. RAID 0 RAID 0 provides data striping, which spreads out blocks of data over all 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 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. D-Link ShareCenter DNS-320 User Manual 98

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D-Link ShareCenter DNS-320 User Manual
Section 5 - Knowledge Base
Knowledge Base
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.one.providing.a.different.method.of.sharing.or.distributing.data.among.the.drives±.
The.device.supports.JBOD,.RAID.0,.RAID.1,.and.Standalone±
RAID.0.provides.data.striping,.which.spreads.out.
blocks.of.data.over.all.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.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±
RAID 0