The serialization mechanism used during a logical dump of zFS data sets consists primarily of the SYSDSN enqueue macro, SYSVSAM enqueue macros and the zFS quiesce macro. A shared SYSDSN enqueue and SYSVSAM enqueues provide serialization if a data set that you want to dump is not mounted

If a zFS data set is mounted before you dump it, the data set can still be quiesced. The quiesce action prevents updates to the data set for the duration of the dump.