Choose A Raid Level - D-Link DNR-322L User Manual

Appendix 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
Advantages
Implements a striped disk RAID Volume as the data is broken down into blocks and each block is written
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to a separate disk drive
I/O performance is greatly improved by spreading the I/O load across many channels and drives
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No parity calculation overhead is involved
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Disadvantages
Not a true RAID because it is not fault tolerant
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The failure of just one drive will result in all data in a RAID Volume being lost
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Should not be used in mission critical environments
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RAID 1
Advantages
Simplest RAID storage subsystem design
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Can increase read performance by processing data requests in parallel since the same data resides on
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two different drives
Disadvantage
Very high disk overhead - uses only 50% of total capacity
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D-Link DNR-322L User Manual

Choose a RAID Level

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