I have array B with Logical drive 2, size xxxx,( 4 hdd 73 GB) RAID 5. I added 2 new 72.4 gb drives then extended array to include these drives. Now it lists Logical drive 2 & Unused space 144.8 gb, which is correct. However when I go to expand Logical drive 2 to incorporate the unused space it only lets me add a third of what the unused space is ( about 50 GB). And 100 GB remain unallocate.What gives?