BECKHOFF Onboard SATA RAID - Manual (Page 20)

Rebuilding the RAID system
Selecting the hard disk
Clicking on Next will cause the warning to appear that any data existing on
the new hard disk will be lost during rebuilding:
Warning
If the rebuild of the RAID volume is started, all data on the selected hard
disk will be irreversibly deleted!
The rebuild is started by clicking on Finish (see chapter Extended view of
the Storage Console ).
18 Beckhoff onboard SATA-RAID