D-Link DNS-6040 [151/185] The dns 6040 series supports the levels raid 0 raid 1 raid 5 and raid 5 with hot spare described below

D-Link DNS-6040 [151/185] The dns 6040 series supports the levels raid 0 raid 1 raid 5 and raid 5 with hot spare described below
DNS-6040M/DNS-6040 User’s Manual
141
Appendix 1
What is RAID?
The acronym RAID stands for Redundant Array of Independent
Drives, a method to combine a number of small, inexpensive
drives into an array which offers more functionality than a
single large disk with comparable capacity, while
simultaneously taking advantage of the individual disks to
increase the efficiency of the system. In other words, during the
writing process, data is split into segments and stored on
multiple disks; likewise, during the reading process, data is
retrieved simultaneously from multiple disks in order to increase
the access speed of the array.
RAID can also be configured to use part of the disk capacity for
mirroring or redundant data, thus preserving the integrity of the
system in case one of the disks in the array fails.
The DNS-6040 Series
supports the levels RAID 0, RAID 1,
RAID 5 and RAID 5 with hot spare, described below:
RAID level Functionality
RAID 0 Offers Striping, a process where multiple disks are combined
to form one virtual large disk, but without safety measures.
RAID 1 Half of the disks are used for backup purposes; the content of
disk A is mirrored to disk B to assure data integrity. The
available storage space is only one half of total physical disk
capacity.
RAID 5 This configuration includes a backup option. It treats multiple
disks as one virtual disk to increase access speed. It uses
parity mode to store redundant data on a space equal to the
size of one disk for later data recovery. The actual available
storage space in a system with n disks is thus n-1 hard disks.

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