I have a Hitachi Travelstar 2.5" drive in a small Nexstar enclosure that I used to back up some data -- AV, some documents, a few system images. I used it tonight for the first time in a year or two, to copy some files onto my Lenovo Thinkpad W530. When I plug the usb 2.0 min-cord into the Lenovo, the drive (or possibly the enclosure?) beeps a few times, and then it seems to spin up normally and works fine. It happens every time, and I don't recall it happening in the past (I suppose it's possible I just forgot, but I doubt it). The SMART data look fine. Haven't tried chkdsk. I don't see any errors or warnings in the Win7 event log. Any idea what may be causing this, and should I be concerned? Thanks.