User manual

32 BEETLE /M-II plus (BOS) User Manual
RAID Controller (optional)
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.
Instead of a RAID onboard controller you optionally can use the RAID Con-
troller. This Controller supports the data maintenance on two hard disks. Ad-
ditionally, the web-based “Promise Array Management Software (WebPAM)
offers a user-friendly management for operating and setting-up the hard disk
arrays.
The system-specific parameters are stored on the hard disks and facilitate
the data migration in case a change of hardware should be necessary.
If a hard disk fails you will hear an acoustic signal which only can be
stopped by changing the hard disk! However, you can switch-off the
signal via software setting.