NEC Express5800/R120b-2 User Manual page 243

6-12 Installing and Using Utilities
7.
Enter the setting of a logical drive.
[Enter RAID setting] steps are displayed.
Confirm the parameters, modify if necessary, and then click [Next].
IMPORTANT: At "The number of the total physical devices",
Parameter File Creator displays upper limit that the RAID Controller
can support.
The total of "The number of physical devices used to create the logical
drive" and "The number of the physical devices specified as the hot
spare" must not exceed "The number of the total physical devices"
which connected to the target system.
NOTE: You can use only the physical devices that have same model
number to configure logical drive.