Nvidia Raid - Foxconn C51XEM2AA User Manual

RAID Arrays
This section describes the following types of RAID arrays that NVIDIA RAID
supports:
v RAID 0
RAID 0 defines a disk striping scheme that improves the disk read and write
times for many applications.
vRAID 1
RAID 1 defines techniques for mirroring data.
vRAID 0+1
RAID 0+1 combines the techniques used in RAID 0 and RAID 1 arrays.
vRAID 5
RAID 5 provides fault tolerance and better utilization of disk capacity.
vSpanning (JBOD)
JBOD provides a method for combining drives of different sizes into one large
disk.
Summary of RAID Configurations
Advantages
Array
High data throughput.
RAID 0
10 0% data redun d-
RAID 1
ancy.
O pt i mi z ed f or b ot h
RAID
1 0 0 % d at a r e d u n -
0+1
d a n c y a n d
f o r m a n c e . A l l o w s
spare disks.
Fault toleranc e and
RAID 5
better utilization of disk
space.
ombines and uses the
JBOD
capac ity of odd size
drives.

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
p e r -
as RAID level 1.
Decreased write per-
formance due to parity
calculations.
D ec r e as e s p e r f o r -
mance because of the
difficulty in using drives
concurrently or to op-
timize drives for differ-
ent uses.
Chapter 6
# Hard Disks Fault Tolerance
multiple
2
4+
3+
multiple
Appendix
None
Yes
Yes
Yes
No
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