Hello,
 
Thank you for reaching NetApp communities. May i know the procedure you have been following to re-sync ?
 
 
Check if transfer in progress asthere shouldn't be any ongoing transfer while performing re-sync.
1. comment out (#) the SM relationship which you want to reverse resync from the /etc/snapmirror.conf in the destination filer.
 
2. Break relationship from the destination. (snapmirror break filerDst:voldst)
 
3. Resync snapmirror relationship from source (snapmirror resync -S filerDst:voldst filersrc:volsrc)
 
4. Now use snapmirror update (snapmirror update -S filerdst:voldst filersrc:volsrc)
 
5. Check snapmirror status from original source. (There should be two snapmirror relationship for that volume)
 
6. Release the earlier snapmirror relationship on source (snapmirror release)
 
7. Create a new entry in /etc/snappmirror.conf file on the source filer (which is now a destination for this SM relationship).
 
 
Thanks,
Nayab