>> chasis and going that way requires an external USB3 rack and a bit of >> magic if the operation cannot be done offline. > > You seen the stuff about running raid over USB? Very unwise? Nope, URL? I mirror the drive in my Intel NUC router to USB3 drive and it works for years with no problems. Of course I'm aware of lower reliability, but I hope I'll get I/O errors if something fails. Am I wrong? Thx, J.