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MegaRAID - Creating a RAID10 Array


This guide will guide you through the creation of a RAID 10 array via the MegaRAID BIOS Config Utility.

Step 1:
Boot into the MegaRAID BIOS Config Utility by pressing CTRL + H at the prompt during boot.

Step 2:
As usage of a mouse may be disabled when one of these hardware controllers is placed, you may use the TAB key to navigate to 'Configuration Wizard'

Step 3:
Opt for 'New Configuration' when there are currently no existing arrays..

Please keep in mind choosing 'New Configuration' will result in all existing RAIDs being removed. Use 'Add Configuration' instead to keep your current arrays as-is.

Step 4:
Select 'Manual Configuration' and proceed to the next screen with the 'Next' button.

Step 5:
To be able to create a RAID10 configuration, you will need to create sets of two in a RAID1 configuration.
Example: For a total of 8 disks in RAID10, you will need pairs of 2.

Tip: Holding shift when selecting drives allows you to highlight more than one drive.

After every two drives you select, you press the 'Add To Array' button. The drives will now be present in the drive group, and may be made permanent by pressing the 'Accept DG' button.

Step 6:
Add all drive groups to be put into the RAID10 array by selecting them and pressing the 'Add to SPAN' button. Press 'next' when done.

Step 7:
Select the correct RAID level in the next menu and configure the caching settings to your liking. In most use-cases, the following settings will yield the best performance.

Default Write: Write Back w/ BBU
Read Policy: Normal
I/O Policy: Cached
Disk Cache Policy: Enabled
Emulation: Disabled
BGI: Disabled (Background Initalization)

Step 8:
When fully done, press the 'Accept' button and agree to the warning. Your RAID will now be configured correctly. The array will perform a quick initialization which may take a few seconds.

Step 9:
If there is desire to have the server boot from the newly created array, it is important to configure it as a boot drive by navigating to the array in question, Scroll to 'Set Boot Drive'  and press the 'Go' button.

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