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Summary of RAID Configurations
RAID Arrays
This section describes the following types of RAID arrays that NVIDIA RAID
supports:
•
RAID 0
RAID 0 defines a disk striping scheme that improves the disk read and write
times for many applications.
•
RAID 1
RAID 1 defines techniques for mirroring data.
•
RAID 0+1 (optional)
RAID 0+1 combines the techniques used in RAID 0 and RAID 1 arrays.
•
RAID 5
(optional)
RAID 5 Provides data striping at the byte level and also stripe error correction
information. This results in excellent performance and good fault tolerance. Level
5 is one of the most popular implementations of RAID.
Array
RAID 0
RAID 1
RAID
0+1
RAID 5
Advantages
High data throughput.
1 0 0 %
d a t a
redundancy.
O pt i mi z ed f or b ot h
1 0 0 % d at a r e d u n -
d a n c y
a n d
perf ormance. Allows
spare disks.
Fault toleranc e and
better utilization of disk
space.
Drawbacks
No fault tolerance.
R equires two drives
for the storage space
of one drive.
R equires two drives
for the storage space
o f o n e d r i v e
—
t h e
same as RAID level 1.
Decreased write per-
formance due to parity
calculations.Requires
at least three drives.
# Hard Disks
multiple
2
4+
3+
Fault Tolerance
None
Yes
Yes
Yes
NVIDIA RAID
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