HP ProLiant ML115 Server - Manual (Page 9)

NVIDIA Corporation 5
C HAPTER 1
About NVIDIA® MediaShield™
Summary of RAID Configurations
Table 1.2 RAID Configuration Summary
Array Uses Advantages Drawbacks
# Hard
Disks
Fault
Tolerance
RAID 0 Non-critical data
requiring high
performance.
High data throughput. No fault tolerance. multiple None
RAID 1 Small databases or any
other small capacity
environment requiring
fault tolerance.
100% data
redundancy.
Allows spare disks Requires two drives for the storage
space of one drive. 2 Yes
RAID
0+1
Critical data requiring
high performance.
Optimized for both
100% data redundancy
and performance.
Allows spare disks.
Requires two drives for the storage
space of one drive—the same as
RAID level 1.
4+ Yes
RAID 5 Critical data and
reasonable level of
performance.
Fault tolerance and
better utilization of
disk space. Decreased write performance due to
parity calculations.
Requires at least three drives. 3+ Yes
JBOD Combining odd size
drives into one big
drive. Combines and uses the
capacity of odd size
drives. Decreases performance because of the
difficulty in using drives concurrently
or to optimize drives for different
uses.
multiple No