It's been 48hrs since I installed a Promise Pegasus R4 8tb Thunderbolt drive. The literature that came with it says synchronization takes around 10 hrs. I have heard others report it takes longer (as long as 30hrs), and I guess that depends on whether it's 4tb or 8tb. So after running 48hrs the synchronization on mine is at 66%. One call to tech support said to set the Background Synchronization Rate in the Promise Utility to "High" which I did. If it made a difference I'm not seeing it. The first 45% of the sync took around 24hrs and now it's taking forever. I made a second call to Promise tech support as well as emailing them system file generated by the software, and they say nothing is wrong with the drive. As it is now, it's going to take 3-4 days to synchronize this drive as opposed to 10 hrs. Anyone else have this happen?