Lenovo ThinkServer RD240 Software User's Manual page 128

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RAID 60 can support up to eight spans and tolerate up to 16 drive
failures, though less than total drive capacity is available. Two drive
failures can be tolerated in each RAID 6 level drive group.
RAID 60 is appropriate when used with data that requires high reliability,
high request rates, high data transfer, and medium to large capacity.
When you select Manual Configuration and click Next, the Disk Group
Definition screen appears. You use this screen to select drives to create
drive groups.
1. Hold <Ctrl> while selecting at least three ready drives in the Drives
panel on the left.
2. Click Add To Array to move the drives to a proposed drive group
configuration in the Disk Groups panel on the right.
If you need to undo the changes, click the Reclaim button.
3. Click Accept DG to create a RAID 6 drive group.
An icon for a second drive group displays in the right panel.
4. Click on the icon for the second drive group to select it.
5. Hold <Ctrl> while selecting at least three more ready drives in the
Drives panel to create a second drive group.
6. Click Add To Array to move the drives to a proposed drive group
configuration in the Disk Groups panel on the right, as shown in
Figure 4.24.
If you need to undo the changes, click the Reclaim button.
WebBIOS Configuration Utility