What causes "unknown partition table" events and how can I prevent them from being logged ?

Issue

• A large number of "unknown partition table" events are constantly being logged in /var/log/messages file:

  Jul  7 15:01:21 hostname kernel: sdel: unknown partition table
  Jul  7 15:01:21 hostname kernel: sdaq: unknown partition table
  Jul  7 15:01:21 hostname kernel: sddl: unknown partition table
  Jul  7 15:01:21 hostname kernel: sdaq: unknown partition table
  Jul  7 15:01:21 hostname kernel: sddl: unknown partition table
  Jul  7 15:07:47 hostname kernel: sdaq: unknown partition table
  Jul  7 15:07:47 hostname kernel: sddl: unknown partition table
  Jul  7 15:07:47 hostname kernel: sdaq: unknown partition table
  Jul  7 15:07:47 hostname kernel: sddl: unknown partition table
  Jul  7 15:07:47 hostname kernel: sdas: unknown partition table
  Jul  7 15:07:47 hostname kernel: sddn: unknown partition table
  Jul  7 15:07:47 hostname kernel: sdas: unknown partition table
  Jul  7 15:07:47 hostname kernel: sddn: unknown partition table
  Jul  7 15:07:47 hostname kernel: sday: unknown partition table
  Jul  7 15:07:47 hostname kernel: sddt: unknown partition table
  :
  

• Are these messages normal or are they something to worry about?

• Is the logging of these messages expected behavior?
• Is there a workaround to prevent these from being logged?
• What is the root cause of these messages?