[brokenmachine]

> The WD Red drives are expressly for NAS usage.

Oh, I was thinking about the cheaper Seagate "Archive" drives which have really slow write speed because of that shingled technology.

> Reduced performance for a few days or a week isn't a huge deal for me.

It could be a huge deal when another drive fails during that week while the array is rebuilding. But if you have more hot spares it's no big deal.