Aggregate Efficiency "lost" with volume move? | NetApp | Page 1

Hi
We are currently in the provess of moving from an older FAS8200 to a FAS50.
We have done the "headswap" and we now have all the old and new disks attached on the FAS50 (all spinning rust)...
We use the "volume move" command with an added "-encrypt-with-aggr-key true".
Running the "aggr show-efficiency" shows a ratio of 1.77:1 on the old aggregates, but 1:1 on the new ones even though we have now moved about 50TB...
I would of cause have hoped that the new compression chip would do a little better 😉
Now the volumes are all snapmirror destinations from A300 systems which will eventually be migrated on to newer hardware as well (using snapmirror).
Do we have to run a manual "sis start -scan-old-data...." on all the volumes we move over in order to get a better compression?

#Aggregate Efficiency "lost" with volume move?