My personal DS1812+ travels via a Pelican Storm IM2300. Its a solid little brick sans drives at 8.2kg(18#) w/drives (6*.75kg=4.5kg) 12.7kg(28#) it is carry on legal in size and weight* in the US w/Drives mostly...
In Europe yeah drives come out and you hope they don't weigh it as its about a kilo and a half over a few carriers limits
Drives get stored in static bags and t-shirts in those cases and carried on in backpack.