We have been seeing an issue which is affecting our systems only when we break our snapmirrors for DR purposes and then fail back afterward. After the DR operation concludes and we are resynced to our original relationship, CIFS performance is much slower. We particularly see this when accessing Office files. We suspected this for a while and confirmed it by creating a "clean" test volume, then running the very same data analysis job against the test volume and an existing production volume. The test volume was just as fast as we expected. The production volume was about 6x slower to run the job. We can definitely track the beginning of the issue to the failover/failback. Does anyone have any ideas? FAS2552, OnTap 9.5.