I bought one of these receivers before Xmas, and its installation went very smoothly. At the same time I bought a Western Digital 1TB USB drive to allow the unit to be used as a PVR - and that's where things stopped going smoothly. A 4GB thumb-drive would work with no issues, just not the HDD.
Google proved little help, with very little information able to be found on this receiver (most of it on Geekzone).
Don from http://www.freetv.co.nz/ provided great after-sales service, and explained that the software the unit ships with is incompatible with WD drives (all others are fine). He pointed me to the DishTV site (http://www.dishtv.co.nz/S7010PVR.htm), where a new firmware update is available to resolve this problem.
I have installed the upgrade, and the whole drive (930GB, in a single FAT32 partition) is visible to the receiver.
Having not been able to find any info when I searched for it, I figured that documenting it in the forum here may help someone else with the same problem.
Cheers
Tim