snapmirror matrix

[leedm]

Hello, I'm going to migrate from 8.2.1 cluster mode 4 node controller to new equipment, what are some ways to migrate from 8.2.1 to 9.15 os?
7 mode to cdot snapmirror is only available in 7 mode and there is no 8.2.1 information in the matrix of cdot to cdot snapmirror

[SpindleNinja]

There's a very long stretch...  I don't think there is one controller model that exists that supports both 8.2 and 9.15.  
Which model controller do you have? 

[leedm]

We plan to proceed with FAS70 or FAS2820, but it's not confirmed yet

[TMACMD]

if you are using 8.2.1, you are probably using at best some variant of the FAS80x0 series (8020/8040/8060). This platform tops out at ONTAP 9.8. I have done a few upgrades this year. Get the current cluster to ONTAP 9.8 and depending on the new equipment, you may be able to "down-rev" the new nodes to 9.10.1P(latest) and use a mixed-version cluster. vol-move everything off to the new nodes, evacuate and remove the old nodes.

There is a lot more to it than that though.

What is the starting hardware? What is the new hardware?

[leedm]

The source equipment is FAS3250 4node and the destination equipment is probably FAS70 or FAS2820.