LaCie 5big Storage Server Technical Brief page 21

LaCie Professional Server RAID - Five Disks
Technical Brief: RAID
page 21
In the scenario where Disk 0 fails some time after a recovery, the
front LED will blink continuously since it cannot boot from the first
drive with an operating system. The administrator may feel a bit
inconvenienced by having to connect a monitor, keyboard, and
mouse to the 5big Storage Server in order to choose Disk 1 as the
boot disk.
To keep the 5big Storage Server boot order, type or copy and paste
the following commands into Command Prompt before mirroring
the system disk (Go to Start>Command Prompt or Start>Run
and type cmd.):
bcdedit /set {current} osdevice boot
bcdedit /set {current} device boot
bcdedit /set {bootmgr} device boot
bcdedit /set {memdiag} device boot
Please follow the steps in
5.3.2. Creating the Mirror.