Randor, Thanks for the detailed info! In my case, though, the "hacktastic registry" solution would not work because the backup drive is a removable SATA drive, not USB. Still, good to know. FYI, looking in my own registry, I only had the USBSTOR data in one pair of keys, both pointing to the same drive:
\??\Volume{9243114d-2fd5-11df-aac5-00e04cf116c3}
and
\DosDevices\G:
Dybs
The shout of progress is not "Eureka!" it's "Strange... that's not what i expected". - peterchen