HP Smart Array 6i Controller and 128MB BBWC - Manual (Page 43)

Drive Arrays and Fault-Tolerance Methods 43
RAID 0—No Fault Tolerance
A RAID 0 configuration provides data striping, but there is no protection against
data loss when a drive fails. However, it is useful for rapid storage of large
amounts of noncritical data (for printing or image editing, for example) or when
cost is the most important consideration.
Advantages:
•
Has the highest write performance of all RAID methods.
•
Has the lowest cost per unit of stored data of all RAID methods.
•
All drive capacity is used to store data (none is needed for fault tolerance).
Disadvantages:
•
All data on the logical drive is lost if a physical drive fails.
•
Cannot use an online spare.
•
Can only preserve data by backing it up to external drives.
RAID 1+0—Drive Mirroring
In a RAID 1+0 configuration, data is duplicated to a second drive.
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