[ceph-users] How big an OSD disk could be?

Dear cephers, Just wonder how big an OSD disk could be? Currently the biggest HDD has a capacity of 18TB or 20TB. It is suitable for an OSD still? Is there a limitation of the capacity of a single OSD? Can it be 30TB , 50TB or 100TB a single OSD? What could be the potential limit? best regards, samuel huxiaoyu(a)horebdata.cn