thanks trurl for your help.
So you mean that I only need not to assign the drive when I start the array and then move data from one disk to this drive?
My understanding is that you intend to use your parity drive as a new data drive and run without a parity drive, correct?
If so, New Config without a parity drive and assign the parity drive to a data slot. When you start the array, unRAID will format that drive. Then you use it however you want as another data drive.
Obviously you won't have any parity protection. Do you have backups of anything important?