Hi, I recently purchased a Synology 1813+, and I'm really impressed so far. But the thing eating me now, is that after expanding a SHR-2 volume consisting of 4x2TB Samsung SpinPoints and 2x3TB WD Reds with another 2x3TB WD Red's (needed the last two for backup as I was coming over from another NAS) my used space went up from 3,784 TB used (which is what i measure when adding all the data on the shares together) to 6,37 TB used space on the volume. What on earth is using 2,586 TB that i can't see?? And if I have to take the volume down to recreate it, are there any performance advantages of going with RAID 6 instead of SHR-2? Any insight and help into this is greatly appreciated