Replace 1 drive in a 2 disk RAID 0 cache pool?

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I created a RAID 0 cache pool using 2 new SSDs BTRFS formatted. One of the drives show SMART errors and will have to be RMA:ed. I have received a replacement drive. What is the procedure to replace one of the drives in this scenario. The forum posts I have found cover only older single drive cache pool scenarios. Is there a way to replace only one drive in this scenario or do I have to treat the RAID 0 cache pool as 1 disk and then re-create the pool using 1 old and 1 new disk?

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