BECKHOFF Onboard SATA RAID - Manual (Page 6)

Product description
Product description
RAID overview
RAID system
(Redundant Array of
Independent Drives) A RAID system (Redundant Array of Independent Drives) serves to
organize several physical hard disks in a computer into one logical drive
(array).
The essential aim of RAID systems is to support error tolerance and to
improve the performance of the memory sub-system.
i
Note
From the point of view of the user or an application program, there is no
distinction between a logical RAID drive and a single hard disk.
RAID level
RAID level The RAID level defines how the data within the volume that encompasses
the hard disks in the array is formatted. The Intel(R) Matrix Storage
Manager supports RAID Level 1 (mirroring) amongst others.
RAID 1 (mirroring)
RAID 1 The RAID 1 level combines two or more hard disks so that all data is
written simultaneously to all array members of the RAID 1 volume. In other
words: the data is mirrored and distributed across the hard disks in the
RAID 1 volume. This creates real-time redundancy of all of the data on the
first drive.
Due to the increased protection against failure, RAID 1 is normally used for
storing critical data. Besides complete data redundancy, a further
advantage is the increased reading transmission rate.
Configuration at delivery state
Configuration Industrial PCs with the CB1051 motherboard, which are delivered with
more than one hard disk (HDD) are equipped with the SATA RAID system
as standard. Two of the hard disks are then combined logically to make a
RAID 1 drive.
The hard disks can be permanently installed inside the computer or also
accessible from outside via hard drive caddies.
4 Beckhoff onboard SATA-RAID