Chapter 5 NVIDIA RAID Introduction
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
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.
Array
RAID 0
RAID 1
RAID
0+1
JBOD
Advantages
High data throughput.
100% data redund-
ancy.
Optimized for both
100% data redun-
dancy and per-
formance. Allows
spare disks.
Combines and uses
the capacity of odd
size drives.
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.
Decreases perfor-
mance because of the
difficulty in using drives
concurrently or to op-
timize drives for differ-
ent uses.
# Hard Disks
multiple
2
4+
multiple
Fault Tolerance
None
Yes
Yes
No
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