Hi joe_intel,
I upgrade bios version 30 WITH windows 7 USB3.0 controller version 2.5.3.34 : no change. After a cold start, nuc doesn't see the disk. If I unplug/replug the disk, even after 5 minutes nuc is started, the disk is not available. If I plug the disk into another usb port, the disk is still not seen by the NUC. If I restart NUC, the disk is OK.
I keek this configuration to see I disconnections still occur.