NEC BladeServer Express5800 Series User Manual page 110

When you select [New Configuration] or [Add Configuration], the screen as shown below appears.
Custom Configuration:
Auto Configuration with
Redundancy:
Auto Configuration
without Redundancy:
IMPORTANT:
PCI EXPRESS ROMB) supports "Custom Configuration" only.
Allows you to define all aspects of the configuration, RAID level,
size, and others.
Automatically creates redundant virtual disk.
Automatically creates non-redundant virtual disk.
The on-board RAID (LSI Logic MegaRAID SAS
Configuring Your Server 4-53