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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
RAID 0+1 combines the techniques used in RAID 0 and RAID 1 arrays.
• Spanning (JBOD)
JBOD provides a method for combining drives of different sizes into one large
disk.
Summary of RAID Configurations
Array
Advantages
RAID 0
High data throughput.
100% data
RAID 1
redundancy.
Optimized for both 100%
RAID
data redundancy and
performance. Allows
0+1
spare disks.
Combines and uses the
capacity of odd size
JBOD
drives.
44
Chapter 5 nVIDIA RAID Introduction
NVIDIA RAID
Drawbacks
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.
D e c r e a s e s p e r f o r -
mance because of the
difficulty in using drives
concurrently or to opti-
mize drives for differ-
ent uses.
44
Fault Tolerance
# Hard Disks
multiple
None
2
Yes
Yes
4+
multiple
No
2004-11-15, 17:36
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