Question About Twin RAID 0 Using My Asus MB

Questions about RAID clearly belong to the Storage forum, quoting what you said:

You forgot to mention what kind of RAID controller you are using, but virtually all support multiple arrays which is what you question is if i understand correctly. So you create the second array the same way as you created the first array: via the RAID setup. Since you install Windows on the first RAID array, and its the same controller, you don't need additional drivers. Once you boot in windows you can see the second array in Disk Management and format it with NTFS, etc.

There are all kinds of onboard RAID, and some motherboards have multiple RAID. You should have listed what kind of motherboard you were using and what kind of RAID controller, for example: Intel ICHxR, AMD/ATi, nVidia MediaShield, JMicron, Promise, Silicon Image, etc.

Saying you have an asus motherboard is like saying you drive a mercedes, but that doesn't say if it runs on gasoline or diesel or biofuels or electric, etc.

And can't you just try to create the second RAID array, have you tried? As you didn't tell what kind of RAID controller you use, i cannot look up the key combination you need to use to enter the RAID BIOS setup, but if you done this before just do the same thing and setup the second RAID array just like you setup the first.

Ah yes, you specified it in the topic title. I would recommend including all information in the post as well, as some people (like me ) might miss this important data.

The key combination for Intel onboard RAID is Control + I, that's what you press just before the operating system is loaded to get in the MatrixRAID setup utility.

I don't really understand your last paragraph though, do you have data on this second array that you wish to keep? If so, was it created with Intel RAID as well? If so, it should be detected automatically without further configuration. If it was created by a different RAID engine, you would need to backup + re-create the array and then restore this data. When you create a RAID array, all data still on the drives should be considered lost.