MSI MS-6728 Manual page 92

MS-6728 ATX Mainboard
What is RAID 1 (mirroring)?
A RAID 1 array contains two hard drives where the data between the two is
mirrored in real time. Since all of the data is duplicated, the operating system treats
the usable space of a RAID 1 array as the maximum size of one hard drive in the
array. For example, two 40 GB hard drives in a RAID 1 array will appear as a single
40 GB hard drive to the operating system.
The primary benefit of RAID 1 mirroring is that it provides 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 data integrity. In the case of a disk
failure, the computer system will remain fully operational to ensure maximum
productivity.
The performance of a RAID 1 array is greater than that of a single drive since
data can be read from multiple disks simultaneously, although disk writes do not
realize the same benefit as is the case with RAID 0.
Minimum Disks:
Advantage:
Redundancy:
Application:
5 - 4
2
100% redundancy of data. One disk may fail, but data will
continue to be accessible. A rebuild to a new disk is recom-
mended to maintain data redundancy.
Excellent - disk mirroring means that all data on one disk is
duplicated on another disk.
Typically used for smaller systems where capacity of one
disk is sufficient and for any application(s) requiring very
high availability.