Re organise hard drives

[Enquiries]

Hi
Further to your previous mail. I cannot rebuild raid. All it talks about is storage pool. If I try to repair with 3 discs in my 4 bay ds 920 + it just says I need to add drive 4 to repair degraded storage pool
I want to get back to situation where I have 3 drives in storage pool and 1 hot spare.
I have dsm 7.2
I am a beginner.
I dont want to start from scratch as I would lose all my settings.
Thanks in anticipation

[ed]

Yes, add the drive and repair it. It should go back to previous setup with one hot spare.