Lenovo ThinkServer RD240 Software User's Manual page 120

4.4.3.7 Using Manual Configuration: RAID 50
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Figure 4.23 RAID 10 Configuration Preview
18. Check the information in the configuration preview.
19. If the virtual drive configuration is acceptable, click Accept to save
the configuration. Otherwise, click Cancel to end the operation and
return to the WebBIOS main menu, or click Back to return to the
previous screens and change the configuration.
20. If you accept the configuration, click Yes at the prompt to save the
configuration.
The WebBIOS main menu appears.
RAID 50 provides the features of both RAID 0 and RAID 5. RAID 50 uses
both distributed parity and drive striping across multiple drive groups.
It provides high data throughput, data redundancy, and very good
performance. It is best implemented on two RAID 5 drive groups with
data striped across both drive groups. Though multiple drive failures can
be tolerated, only one drive failure can be tolerated in each RAID 5 level
drive group.
WebBIOS Configuration Utility