I need to migrate some SnapMirror sources from one 2220 to another 2220 (our destination is a 3270). I have read the documentation in the Data OnTAP Data Protection Online Backup and Recovery Guide about Moving SnapMirror Sources without having to reseed volumes. The documentation covers moving volume SnapMirror sources and qtree SnapMirror sources. However, we are using volume-to-qtree SnapMirror, so it is basically a hybrid of the two approaches. This approach is not explicitly covered in documentation. I have mapped out what I believe will work from the existing documentation, as seen below. Does anyone see an issue with this approach? In particular I am interested in verifying that step 4 will work as I'm expecting it to. Any thoughts or advice will be appreciated!
First, copy the original source on the original 2220 to the new source on the new 2220 using snapmirror initialize.
Create a manual snapshot copy on the original source on the original 2220. Don’t add /- at the end of the source volume name, i.e. treat it as a standard volume (which it is).
Update the new source on the new 2220 with the same common snapshot name as the one just created on the original source. Again, don’t add /- at the end of the source volume name. So far I’m treating it just as a volume SnapMirror procedure.
Update the destination filer (a 3270 filer) with the same common snapshot name as the one created on the original source. This time add the /- at the end of the source volume name, which creates a qtree SnapMirror update.
Quiesce and break the original SnapMirror relationship between the original 2220 and the 3270, and also quiesce and break the SnapMirror relationship created temporarily between the old and new 2220’s.
Edit snapmirror.conf to indicate the source volume is now on the new filer (the new filer will have a temporary name at this point).
Establish the new SnapMirror relationship by issuing a resync command, adding /- at the end of the source volume name.