Techniques for performing data transfers may include determining a first page of user data to be transferred from a source data storage system to a target data storage system, wherein the source data storage system has a source page size granularity denoting a first size of backend I/O operations on the source data storage system, wherein the target data storage system has a target page size granularity denoting a second size of backend I/O operations on the target data storage system; performing processing on the source data storage system that constructs a second page of user data that is the second size, wherein the second page of user data includes the first page of user data that is the first size and another page of user data that is the first size; and transferring the second page of user data from the source to the target data storage system.