recently in the lab we bought some HDs and a new flash drive for research stuff. My surprise was when I tried to connect them to linux. Gnome mounted them normaly, but did not exist the /dev/sdb1 partition, the system only seen /dev/sdb. In that momment was an "emergency service", then I created a new partition table on the HDs/stick and everything worked fine, but now I want understand what happened there. Mainly because some scripts broke since they were looking for /dev/sdb1 specifically.
I tried to search about, but I don't know how to start. Some advice?