Yes, my PC has USB2.0 ports and the WD and Philips drives are running
direct off the PC, while the Seagate is running off a USB2.0 hub (which
may, or may not, be part of the problem). In fact, this *is* kind of
part of the problem with the Seagate - after it spins down, when you try
to access it again, the drive itself comes back as USB1.1, even though
it's a USB2.0 drive. Windows can handle it, Linux can't.