It seems my old Gen2 Drobo was unplugged one too many times. I unplugged and (gently) moved the Drobo out of the way so I could replace my 8-year-old AMD motherboard with a shiny new Intel i5.
Sometimes it goes into a reboot loop; other times it appears to boot normally, but then Windows reports a “USB device failure” and won’t mount. Sometimes the power light is red, other times it is green but all other lights are out. Pin reset didn’t help, neither did starting without drives…just stares at me like “who are you and what do you want”. I tried a different USB cable too. If I leave the USB unplugged and power it up it sometimes acts up, while other times it seems normal until I plug the USB back in.
Nothing critical on it thank goodness. Frustrating for sure, but it is vintage 2008. Anything else I could try?