This is the same controller with the BIOS that has an option to keep the data on the RAID set when you delete the RAID set, except that at no point does it tell you that option will be presented to you, so unless you know about it, you're never likely to try the "Delete..." option as a path to rebuilding, despite it being the correct one.

I think I hashed that explanation up but you can probably work out what I mean.

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