Avago Technologies MegaRAID Fast Path Software - Manual (Page 77)

LSI Corporation Confidential | July 2011 Page 77
MegaRAID SAS Software User Guide Chapter 4: WebBIOS Configuration Utility | Creating a Storage Configuration
— Update Size: Click Update Size to update the Select size field value for the
selected RAID levels
8. Click Accept to accept the changes to the virtual drive definition.
If you need to undo the changes, click Reclaim.
9. Click Next after you finish defining the virtual drives.
The Configuration Preview dialog appears, as shown in Figure 37 .
Figure 37: RAID 1 Configuration Preview Dialog
10. Check the information in the Configuration Preview dialog.
11. If the virtual drive configuration is acceptable, click Accept to save the
configuration. Otherwise, click Back to return to the previous dialogs and change
the configuration.
12. If you accept the configuration, click Yes at the prompt to save the configuration.
The WebBIOS main menu appears.
4.5.2.3 Using Manual
Configuration: RAID 5
RAID 5 uses drive striping at the block level and parity. In RAID 5, the parity information
is written to all drives. It is best suited for networks that perform a lot of small
input/output (I/O) transactions simultaneously. RAID 5 provides data redundancy, high
read rates, and good performance in most environments. It also provides redundancy
with lowest loss of capacity.
RAID 5 provides high data throughput. RAID 5 is useful for transaction processing
applications because each drive can read and write independently. If a drive fails, the
RAID controller uses the parity drive to re-create all missing information. You can use
RAID 5 for office automation and online customer service that require fault tolerance.