Avago Technologies MegaRAID Fast Path Software - Manual (Page 69)

LSI Corporation Confidential | July 2011 Page 69
MegaRAID SAS Software User Guide Chapter 4: WebBIOS Configuration Utility | Creating a Storage Configuration
4.5.1 Using Automatic Configuration Follow these instructions to create a configuration with automatic configuration, either
with or without redundancy:
1. When WebBIOS displays the proposed new configuration, review the information
on the dialog, and click Accept to accept it. (Or click Back to go back and change
the configuration.)
— RAID 0: If you select Automatic Configuration and No Redundancy, WebBIOS
creates a RAID 0 configuration.
— RAID 1: If you select Automatic Configuration and Redundancy when
possible, and only two drives are available, WebBIOS creates a RAID 1
configuration.
— RAID 5: If you select Automatic Configuration and Redundancy when
possible, and three or more drives are available, WebBIOS creates a RAID 5
configuration.
— RAID 6: If you select Automatic Configuration and Redundancy when
possible, and the RAID 6 option is enabled, and three or more drives are
available, WebBIOS creates a RAID 6 configuration.
2. Click Yes when you are prompted to save the configuration.
3. Click Yes when you are prompted to initialize the new virtual drives.
WebBIOS configuration utility begins a background initialization of the virtual
drives.
New RAID 5 virtual drives and new RAID 6 virtual drives require a minimum number
of drives for a background initialization to start. If there are fewer drives, the
background initialization will not start. The following number of drives is required:
— New RAID 5 virtual drives must have at least five drives for a background
initialization to start.
— New RAID 6 virtual drives must have at least seven drives for a background
initialization to start.
4.5.2 Using Manual Configuration This section contains the procedures for creating RAID drive groups for RAID levels 0, 1,
5, 6, 00, 10, 50, and 60.
4.5.2.1 Using Manual
Configuration: RAID 0
RAID 0 provides drive striping across all drives in the RAID drive group. RAID 0 does not
provide any data redundancy but does offer excellent performance. RAID 0 is ideal for
applications that require high bandwidth but do not require fault tolerance. RAID 0 also
denotes an independent or single drive.
NOTE: RAID level 0 is not fault-tolerant. If a drive in a RAID 0 drive group fails, the whole
virtual drive (all drives associated with the virtual drive) fails.
When you select Manual Configuration and click Next, the Drive Group Definition
dialog appears. Use this dialog to select drives to create drive groups.
1. Hold Ctrl while selecting two or more ready drives in the Drives panel on the left
until you have selected all desired drives for the drive group.
2. Click Add To Array to move the drives to a proposed drive group configuration in
the Drive Groups panel on the right, as shown in Figure 32 .
If you need to undo the changes, click Reclaim.