Lenovo ThinkServer RD330 Software User's Manual page 80

Chapter 4: WebBIOS Configuration Utility
4.5.3.4 Using Manual
Configuration: RAID 6
Page 80
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Creating a Storage Configuration
— Select Size: Specify the size of the virtual drive in megabytes. Normally, this
would be the full size for RAID 5 shown in the Configuration panel on the right.
You can specify a smaller size if you want to create other virtual drives on the
same drive group.
8. Click Accept to accept the changes to the virtual drive definition.
9. If you need to undo the changes, click Reclaim.
10. Click Next after you finish defining the virtual drives.
The Configuration Preview screen appears, as shown in Figure 40.
Figure 40:
11. Check the information in the configuration preview.
12. 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.
13. If you accept the configuration, click Yes at the prompt to save the configuration.
The WebBIOS main menu appears.
RAID 6 is similar to RAID 5 (drive striping and distributed parity), except that instead of
one parity block per stripe, there are two. With two independent parity blocks, RAID 6
can survive the loss of two drives in a virtual drive without losing data. Use RAID 6 for
data that requires a very high level of protection from loss.
RAID 6 is best suited for networks that perform a lot of small input/output (I/O)
transactions simultaneously. It provides data redundancy, high read rates, and good
performance in most environments.
RAID 5 Configuration Preview
MegaRAID SAS Software User Guide