H700 Maximum Disk / LUN Size

I'm looking to construct the largest possible internal RAID6 on an R510 with an H700 1GB.

Is there an established maximum size for a HDD connected to an H700? I know the 4TB disks are supported, but what about 6TB or 8TB?

Also, is there a maximum LUN size? The H700 manual mentions nothing about LUN sizes. I believe the H710 has a max of 64TB.

The other option would be to use the H800 and add external storage. Any known maximums there other than 192 drives?