Avago Technologies MegaRAID Fast Path Software - Manual (Page 93)

LSI Corporation Confidential | July 2011 Page 93
MegaRAID SAS Software User Guide Chapter 4: WebBIOS Configuration Utility | Creating a Storage Configuration
RAID 10 provides both high data transfer rates and complete data redundancy. It works
best for data storage that must have 100 percent redundancy of RAID 1 (mirrored drive
groups) and that also needs the enhanced I/O performance of RAID 0 (striped drive
groups); it works well for medium-sized databases or any environment that requires a
higher degree of fault tolerance and moderate to medium capacity.
When you select Manual Configuration and click Next, the Drive Group Definition
dialog appears.
You use the Drive Group Definition dialog to select drives to create drive groups.
1. Hold the Ctrl key while selecting two ready drives in the Drives panel on the left.
2. Click Add To Array to move the drives to a proposed two-drive group configuration
in the Drive Groups panel on the right.
3. If you need to undo the changes, click Reclaim.
4. Click Accept DG to create a RAID 1 drive group.
An icon for the next drive group appears in the right panel.
5. Click the icon for the next drive group to select it.
6. Hold the Ctrl key while selecting two more ready drives in the Drives panel to create
a second RAID 1 drive group with two drives.
7. Click Add To Array to move the drives to a second two-drive group configuration in
the Drive Groups panel, as shown in Figure 48 .
If you need to undo the changes, click Reclaim.
8. Choose whether to use power saving.
9. Choose whether to use drive encryption.
NOTE: RAID 10 supports a maximum of eight spans, with a maximum of 32 drives per
span. (Other factors, such as the type of controller, can limit the number of drives.) You
must use an even number of drives in each RAID 10 drive group in the span.