I don't need to test it. I know it's technically impossible to partition a >2TB drive reporting 512 byte block size (that's what current drives do due to compatibility reasons). These drives will report more than 2^32-1 sectors and you cannot fit such number into 32bit data type (used by both TD_GETGEOMETRY and RDB itself).
hm, I wonder if that compatibility mode could be turned off;
because, with 4096 byte blocks, the limit would be 8*2Gb ?
I mean at least some new OS/software would be able to use largest drives without requiring new controllers?
plus the drives might be a bit faster.