NEC Express5800/R120b-1 User Manual page 163

NOTES:
You can use only the physical devices that have same model number
to configure logical drive.
If the process is not finished normally, the driver may not be stored
in the EXPRESSBUILDER. Refer to "Optional Board Supported by
NEC EXPRESSBUILDER" described earlier in this chapter.
10.
Specify the installing medium and the Windows system partition.
[Specify medium / Partition] steps are displayed. Confirm the parameters, modify if
necessary, and then click [Next].
Installing the Operating System with Express Setup 5-13