In a usual medium-to-large cloud configuration where 3-5 redundant copies of each chunk/file/object are randomly and thinly spread across hundreds or thousands

In a usual medium-to-large cloud configuration where 3-5 redundant copies of each chunk/file/object are randomly and thinly spread across hundreds or thousands of drives, a loss of a single 18TB drive would result in a few minutes of «redundancy repair». No RAIDs would be harmed in the process.