Choose.a.raid.level - D-Link DNS-726-4 - Network Video Recorder Standalone DVR Product Manual

Appendx A - Choose a RAID Level
There are several issues to consider when choosing the RAID level. The following summarizes some
advantages, disadvantages and applications for each choice.
RAID.0
Advantage
Implements a striped disk RAID Volume, the data is broken down into blocks and each block is written

to a separate disk drive
I/O performance is greatly improved by spreading the I/O load across many channels and drives

No parity calculation overhead is involved

Disadvantage
Not a true RAID because it is not fault tolerant

The failure of just one drive will result in all data in an RAID Volume being lost

Should not be used in mission critical environments

RAID.1
Advantage.
Simplest RAID storage subsystem design

Can increase read performance by processing data requests in parallel since the same data resides

on two different drives
Disadvantage.
Very high disk overhead - uses only 50% of total capacity

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Choose a RAID Level
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