HP Xw9300 NVIDIA: RAID Users Guide - Page 12

Summary of RAID Configurations, Array, Advantages, Drawbacks, Disks, Fault, Tolerance

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CHAPTER 1 About NVIDIA RAID Summary of RAID Configurations Table 1.1 RAID Configuration Summary Array Uses Advantages Drawbacks # Hard Disks RAID 0 RAID 1 RAID 0+1 JBOD Non-critical data requiring high performance. Small databases or any other small capacity environment requiring fault tolerance. Critical data requiring high performance. Combining odd size drives into one big drive. High data throughput. 100% data redundancy. Optimized for both 100% data redundancy and performance. Allows spare disks. Combines and uses the capacity of odd size drives. No fault tolerance. Requires two drives for the storage space of one drive. Requires two drives for the storage space of one drive-the same as RAID level 1. Decreases performance because of the difficulty in using drives concurrently or to optimize drives for different uses. multiple 2 4+ multiple Fault Tolerance None Yes Yes No 8 NVIDIA RAID User's Guide - Version 2.0 A

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8
NVIDIA RAID User’s Guide
– Version 2.0 A
C
HAPTER
1
About NVIDIA RAID
Summary of RAID Configurations
Table 1.1
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.
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
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