Rollback

Rollback allows you to revert a zvol or dataset to the state it was at the moment of taking the snapshot we are rolling back to.

Attention!

This operation cannot be undone. All snapshots that were taken after the snapshot we are rolling back to and their clones will be removed. 
Also the actual data on dataset/zvol will be lost.

A clone of a snapshot should be created before rollback in order to make the data on the snapshot available and to check that data on the clone 
are the ones we want to have on the dataset/zvol after rollback.