> If you want your data to be stored persistent for real, you need to issue a sync command to make the operating system block and only return control after the

> If you want your data to be stored persistent for real, you need to issue a sync command to make the operating system block and only return control after the data has been persisted. Well on linux the work that has to be done during a blocking sync() can be minimized by triggering async writeback via sync_file_range in advance.