John,

Back in the days when 7MTT was very limited, I moved hundreds of volumes between 7-mode systems and C-mode using SnapMirrors.  I believe the process is still valid:
https://docs.netapp.com/us-en/ontap-7mode-transition/snapmirror/task_transitioning_a_stand_alone_volume.html

The key was setting up the snapmirrors on the C-mode target with the "-type TDP" flag.

Regards,
Brian Jones



On Thu, Feb 17, 2022 at 2:02 PM John Stoffel <john@stoffel.org> wrote:

Guys,
Trying to migrate from an ancient 7-mode 8.1.3 system to a slightly
newer cDOT 9.5 system.  I was smart and pre-snapmirrored the
volumes. But I'd like for 7mtt to copy the CIFS shares and such.
But... 7mtt v3.4 isn't happy with volumes which already have
snapmirror relationships.

The source 7-mode system has snapmirrors to both another 7-mode
system, as well as to the new cDOT system VServer called 'data'.

I'm stuck at "Plan and Design" "Map Volumes" where I've picked the
source and destination volumes (which already exist on the
destination) but which it won't let me use because there isn't enough
space on the aggregeates due to the currently existing volumes.

Fun.

Yes, I'm probably an idiot for having done this backwards... any maybe
the real answer is to just do the cutover and re-build the cifs shares
by hand.  Ugh....

John
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