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7.2. Choosing a RAID Level
There are several issues to consider when choosing the RAID level for your Volume.
The following discussion summarizes some advantages, disadvantages and
applications for each choice.
RAID 0
Advantages Disadvantages
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
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
Recommended applications for RAID 0:
• Image
Editing
• Pre-Press
Applications
•
Any application requiring high bandwidth
RAID 1
Advantages Disadvantages
Simplest RAID storage subsystem
design
Can increase read performance by
processing data requests in parallel
since the same data resides on two
different drives
Very high disk overhead - uses only
50% of total capacity
Recommended applications for RAID 1:
• Accounting/Financial
• Payroll
•
Any application requiring very high availability
