Intel Matrix Storage Manager User's Manual

Intel® Matrix Storage Manager Feature Overview
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Refer to the following web site for more information on RAID 0:
http://support.intel.com/support/chipsets/iaa_raid/sb/CS-009337.htm
2.2 RAID 1 (Mirroring)
A RAID 1 array contains two hard drives where the data between the two is mirrored in real time
to provide good data reliability in the case of a single disk failure; when one disk drive fails, all
data is immediately available on the other without any impact to the integrity of the data.
Table 2 provides an overview of the advantages, the level of fault-tolerance provided, and the
typical usage of RAID 1.
Hard Drives
Required:
2
Advantage:
100% redundancy of data. One disk may fail, but data will continue to be accessible. A
rebuild to a new disk is recommended to maintain data redundancy.
Fault-tolerance:
Excellent – disk mirroring means that all data on one disk is duplicated on another disk.
Application:
Typically used for smaller systems where capacity of one disk is sufficient and for any
application(s) requiring very high availability. Available in specific mobile configurations.
Table 2: RAID 1
Refer to the following web site for more information on RAID 1:
http://support.intel.com/support/chipsets/iaa_raid/sb/CS-009338.htm
2.3 RAID 5 (Striping with Parity)
A RAID 5 array contains three or more hard drives where the data and parity are striped across all
the hard drives in the array. Parity is a mathematical method for recreating data that was lost from
a single drive, which increases fault-tolerance.
Table 3 provides an overview of the advantages, the level of fault-tolerance provided, and the
typical usage of RAID 5.
Hard Drives
Required:
3-6
Advantage:
Higher percentage of usable capacity and high read performance as well as fault-
tolerance.
Fault-tolerance:
Excellent - parity information allows data to be rebuilt after replacing a failed hard drive
with a new drive.
Application:
Storage of large amounts of critical data. Not available in mobile configurations.
Table 3. RAID 5
Refer to the following web site for more information on RAID 5:
http://support.intel.com/support/chipsets/imsm/sb/CS-020653.htm
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