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1
HAPTER
About NVIDIA® MediaShield™
Summary of RAID Configurations
RAID Configuration Summary
Table 1.1
Array
Uses
Non-critical data
RAID 0
requiring high
performance.
RAID 1
Small databases or any
other small capacity
environment requiring
fault tolerance.
RAID
Critical data requiring
0+1
high performance.
RAID 5
Critical data and
reasonable level of
performance.
Combining odd size
JBOD
drives into one big
drive.
NVIDIA MediaShield Features
Additional RAID Features
NVIDIA MediaShield offers the following additional features:
• Free Disk and Dedicated Spare Disk
A Free Disk or Dedicated Disk can be automatically used in case one drive of a fault-
tolerant array fails. NVIDIA MediaShield defines a fault-tolerant array as either RAID
1, RAID 0+1, or RAID 5. A free disk can be used by any available fault-tolerant array,
while a dedicated disk can be used only by the array to which it is assigned.
• Bootable RAID
This allows you to install the operating system onto the RAID volume.
• Migrating
Migrating is the ability to convert from one RAID mode to another RAID mode. This
allows the user to upgrade their current disk or array for better performance, higher
security, and increased capacity. More importantly, this is accomplished without
10
Advantages
Drawbacks
High data throughput.
No fault tolerance.
100% data
Requires two drives for the storage
redundancy.
space of one drive.
Allows spare disks
Optimized for both
Requires two drives for the storage
100% data redundancy
space of one drive—the same as
and performance.
RAID level 1.
Allows spare disks.
Fault tolerance and
Decreased write performance due to
better utilization of
parity calculations.
disk space.
Requires at least three drives.
Combines and uses the
Decreases performance because of the
capacity of odd size
difficulty in using drives concurrently
drives.
or to optimize drives for different
uses.
# Hard
Disks
multiple
2
4+
3+
multiple
MediaShield User's Guide – Version 4.0
Fault
Tolerance
None
Yes
Yes
Yes
No
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