One of the best aspects of ZFS is its reliability. This can be accomplished using a few features like copy-on-write approach and checksumming. Today we will look at how ZFS does checksumming and why it does it the proper way. //

We can see that using a merkle tree is a very safe way to store data on the disk, as it allows us to detect a lot of problems in the system. It is also worth noting that if ZFS is configured in the redundant way, it will detect broken data, return correct data (of course if possible) and also will repair them. This feature is called self-healing.