Celerra Rep V2

I'm replicating a 12TB file system fs1_copy to DR Array and the full copy is in progress. I have a situation now to stop the replication for a while (4-5) hours and restart it again. My question is.

Can I stop the replication while the full sync is in progress?

Will I be able to unmount source file system fs1_copy and rename it as fs1 and restart replication from where it left off with out syncing from the beginning?

I have also noticed that while fs1_copy of source is getting auto extended, the DR side fs_copy file system is not getting auto extended. I believe it will get auto extended once the full sync is complete. Is that correct?

Thanks in advance.