A mechanism for managing storage block of a data volume is disclosed. A method includes determining, by a processing device, whether a current data is to be written into an entirety of a storage block of a data volume of an operating system. The method also includes deleting, by the processing device, all of previously written data on the storage block before writing the current data into the storage block in response to determining that the current data is not to be written into the entirety of the storage block. The current data is different from the previously written data.