Hi zen2000,

That's because P: drive isn't actually a drive :) - it's our service, telling Windows (or OSX) that what it's seeing is a drive. Our drive application makes it possible to interact with your Pogo-enabled disks as though they were a local drives for many functions, but not all. For example, if you have multiple Pogoplugs on the same account and log into your drive application you will see ALL the physical drives connected to ALL the Pogoplugs under P:

We do not have any plans to implement a defrag feature (it would be technically challenging and would consume a lot of our engineering bandwidth) currently; the workaround is precisely what you did - safely unmount, defrag, and plug the drive back into the Pogoplug. It's not likely that you'll have to do that too frequently. I hope that answers the question!

Jon - QA, Cloud Engines