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M S-7252 M ainboard
Introduct ion
System Requirement
Operating System Support
NVRAID supports the following operating systems:
W indows XP/ 2000
RAID Arrays
NVRAID supports the following types of RAID arrays described in this section:
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.
RAID 5: RAID 5 defines techniques for parity data.
Spanning (JBOD): JBOD provides a method for combining drives of different sizes
into one large disk
Summary of RAID Configurations
Array
Uses
RAID 0
Non-critical data
requiring high
performance.
RAID 1
Small databases or any
other small capacity
environment requiring
fault tolerance.
RAID 0+1
Critical data requiring
high performance.
RAID 5
Critical data and
reasonable level of
performance.
JBOD
Combining odd size
drives into one big drive
C-2
Advantages
Drawbacks
High data throughput.
No fault tolerance.
100% data
Requires 2 drives for
redundancy.
the storage space of 1
drive.
Optimized for both
Requires 2 drives for
100% data
the storage space of 1
redundancy and
drive—the same as
performance.
RAID level 1.
Allows spare disks.
Fault tolerance and
Decreased write
better utilization of
performance due to
disk space.
parity calculations.
Requires at least
three drives.
Combines and uses
Decreases
the capacity of odd
performance because
size drives.
of the difficulty in
using drives
concurrently or to
optimize drives for
different uses.
# Hard
Fault
Disks
Tolerance
multiple
None
2
Yes
4+
Yes
3+
Yes
Multiple
No
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