Just this morning, I accidentally created a hdd filesystem without a partition table.  I didn't even know it was possible but it happened.  Now the issue is to undo it or leave it alone.For this particular case, I don't want multiple partitions so having no partition table is no problem for me. Indeed, in terms of sysadmin, it's actually  convenient.  But I don't know if there is any loss of functionality with linux.  And I posting to get some guidance on that. What functionality (other than adding and resizing partitions) am I loosing by not having a partition table.  What about portability or compatibility with future system upgrades (staying within linux)?  How about interoperability between Linux, Windows and OS X?
Partition table-less HDD
filesystems;partition;hard disk