sub mesa said:
If you create a RAID0 of two disks, both disks would lose their data. You said one disk already has data on it, then you can't use that for a RAID0 array if its in use.
Please read a bit on what RAID is and how to use it. Always make sure you have a good backup. You might end up losing data otherwise.
Thank you for the reply. I didn't realize that it attempts to create RAID0 when you are extending dynamic volume in windows Storage Manager. this term is missing in all Microsoft articles on this topic