Dawicontrol DC-150 RAID Manuel page 15

Manual
6.1. Non-RAID Mode (Single Disk Mode)
This mode treats each hard disk as an independent device.
6.2. Striping (RAID 0)
Data blocks are written alternately on the hard disks. The fact that the data
blocks are spread on two or more drives and that the controller is able to
address two hard disks at the same time leads to a considerable increase
in performance and to an ideal concentration of capacity. Failure of one
member of the array affects the whole array. The hard disks should be
identical, otherwise the size and performance of the smallest hard disk is
applied as a standard for the other ones.
6.3. Mirroring (RAID 1)
The data blocks are duplicated by the RAID controller and written in parallel
(or mirrored) on two hard disks at the same time. Mirroring data on two hard
disks considerably increases data availability as well as data security. As
the controller is able to address two hard disks at the same time, performance
practically remains constant as opposed to one single hard disk. In case of
failure of one hard disk due to a fault, the other hard disk assumes its
function without data being lost. The faulty hard disk can then be exchanged
and the data from the working hard disk copied onto the new one, so that
complete redundancy of data is re-established.
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