ONTAP Hardware

2 x FAS8040 single in the same Enclosure. one running ONTAP 9 another running ONTAP 7-mode 8.2.5


Hi friends.

I´d like to know if the following scenario is possible:

I have a single chassis with 2 FAS8040 working as HA Pair running ONTAP 7-mode 8.2.5

The intention is to migrate to ONTAP 9, with additional disks, but using one of the FAS8040 CPU´s.

To accomplish that, I´d remove one CPU from the 7-mode HA-pair. Lets call this CPU as "CPU-B".

So, at this time, CPU-A serves all data on the 7-mode environment. CPU-B is disconected, both in the same chassis.

Disconnect all cables connected to CPU-B. Recable CPU-A to single

Modify the ha-config parameter on chassis to non-ha, if necessary (will be necessary to enter in maintenance mode)

At this point both CPU´s are isolated each other, but in the same chassis.

Then I install ONTAP 9 on CPU-B with new shelves bought by customer. Cable the shelves and install the ONTAP as a single cluster.

Then I start copying the data from 7-mode CPU to Cluster CPU (using 7MTT or any other method).

When finished, reformat the CPU-A with ONTAP 9 and join it into Cluster CPU-B to restabilish the HA-Pair in C-mode.

Anyone knows if this is possible? Or maybe some similar procedure?

Thanks in advance,


Roger Ivo



In the same HA pair, i'm going to say, no.  


There's a copy-free transition which is kinda like what you described but requires new heads and not really for the faint of heart IMHO.     - https://docs.netapp.com/ontap-9/topic/com.netapp.doc.dot-7mtt-cft/GUID-85E96D13-B32F-4445-B658-7C7D0AA3997E.html 


I've done this conversion before for customers, and we got swing gear (heads, disks and switches).   
Went something like this ->  
Deploy loner heads as cluster as a switched cluster.  

Migrate to it.    
convert FAS8xxx to ONTAP (cdot)   

Join it to the existing cluster.  
vol move data over.  
remove/decom loaner gear. 
convert to switchless cluster.   

Register for Insight 2021 Digital

INSIGHT 2021 Digital: Meet the Specialists 2

On October 20-22, gear up for a fully digital, totally immersive virtual experience with a downright legendary lineup of world-renowned specialists. Tune in for visionary conversations, solution deep dives, technical sessions and more.

NetApp on Discord Image

We're on Discord, are you?

Live Chat, Watch Parties, and More!

Explore Banner

Meet Explore, NetApp’s digital sales platform

Engage digitally throughout the sales process, from product discovery to configuration, and handle all your post-purchase needs.

NetApp Insights to Action
I2A Banner