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99D-Link ShareCenter Shadow DNS-325 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 ShareCenter™ supports JBOD, RAID 0,
RAID 1, and Standard.
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