Do I need to create a partition on mounted disks?

Question

linux

Question for the gurus.
There is a Linux server on which the web server is running. User data is stored on a separate mounted drive.
Question: The user data disk is formatted in ext4 without first creating partitions on it (that is, inserting a new disk and running mkfs.ext4). How acceptable is this approach and what kind of rake can come out?

Answer 1

Just like that, it will not work to plug the disk into another system - it will swear that it cannot read the partition table.
There may be a performance penalty, since when creating sections, their beginnings and ends are chosen in the most optimal way.
Loss of flexibility due to the inability to maneuver sections - you can not just reduce this section in order to add another one.
Other rake is not expected.