D-Link DNR-322L User Manual page 71

Section 3 - Configuration
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 NVR 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 its smallest
member disk.
Because the data is stored on both disks,
RAID 1 provides fault tolerance and protection,
in addition to performance advantages.
D-Link DNR-322L User Manual
What is RAID?
RAID 0
RAID 1
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