User manual

30 BEETLE /M-II plus (BOS) User Manual
RAID Onboard (optional)
General
RAID stands for «Redundant Array of Independent Disks». This is a method
to interconnect several data carriers, e.g. to store data redundantly or to in-
crease data throughput. By creating such a data redundancy a system can
be recovered e.g. after a hard disk failure.
There are different ways to create data redundancy. These ways are classi-
fied by RAID levels.
The RAID Controller used in the BEETLE /MII-plus (BOS) supports the RAID
level 1. With this method data will be mirrored i.e. data will be stored on two
independent data carriers (Hard Disk 1 and 2).
The advantage of this procedure is a complete data security.
The standard H1 motherboard is equipped with a RAID onboard controller.
However, the use of this controller is an option.
The standard G41 motherboard is not equipped with a RAID onboard con-
troller.
Note: Linux supporting drivers are not on offer. Therefore, the lower
row of LED neither receives signals nor displays a status. Only the
activities are visible.
Switch-off button (Alarm)
The switch-off button for an alarm is located on the rear side of the BEETLE
system. Pushing the button will switch off an acoustic signal, that is gener-
ated through an error message of a hard disk.
With a switch-off button installed the COM8* interface is not available.