Hey there, dxiaman!
Can you provide more details about your external HDD and the RAID configuration? It's highly unlikely you'd be able to access your data from the RAID HDDs and your system would require you to reformat them. I'd recommend you to test the drives first, using their brand-specific diagnostic tool. In case you can't find this on the HDD manufacturer's website, you can refer to
some good third-party testing tool suggestion here.
You most probably won't be able to access the data from the SATA ports due to the fact that most external enclosures are configured with different 4K LBAs than the native SATA LBAs (512e).
IF the data is very important, you should probably consider contacting a professional data recovery company. They are your best bet at getting your files back.
Keep me posted & Good luck!
SuperSoph_WD