HYDME0727W Additional Storage Classes cannot be created.

Explanation
      You cannot create more than 256 Storage Classes can be created. The maximum number of Storage Classes has been reached.

  
Operator response
      Delete Storage Classes that are unused or no longer necessary until the total number deleted is greater than
    or equal to the number of new Storage Classes you want to create. Then, try again to create one or more new
    Storage Classes.