topic Re: NVRAM size mismatch between nodes detected in ONTAP Hardware

NVRAM size mismatch between nodes detected

SEIMTEXTER — Wed, 04 Jun 2025 10:35:14 GMT

Hello,

I have a FAS2552 with each controller reporting this during boot.

Feb 15 15:10:57 [<arrayname>:nv.partner.size.mismatch:ALERT]: CF monitor: NVRAM size mismatch between nodes detected; node requires 661651456 bytes, partner exported 0 bytes.

Nodes are cabled correctly and it's just a 2-controller / no expansion switchless cluster running ONTAP 9.7. Any ideas are welcome, but I need to get this fixed!

Doesn't appear to be a bad NV DIMM -

2552::> system fru-check show
Node FRU Status
------------------ ---------------------------- -----------
2552-01
DIMM-1 pass
DIMM-NV1 pass
2552-02
DIMM-1 pass
DIMM-NV1 pass
BootMedia pass
PCIe Devices pass
6 entries were displayed.

What's going on here?

Re: NVRAM size mismatch between nodes detected

hmoubara — Tue, 16 Feb 2021 04:04:17 GMT

Hello,

Is the error mentioned only seen during boot?

Can you verify the health of the cluster:

> system ha interconnect status show

> cluster show

Thanks

Re: NVRAM size mismatch between nodes detected

Mjizzini — Tue, 16 Feb 2021 05:55:46 GMT

This could have happened during reboot while the interconnect was down.

To verify the health of the interconnect, run the command below.

::*>storage failover show -instance

If the interconnect link is fine, a takeover giveback should clear this issue.

Re: NVRAM size mismatch between nodes detected

SEIMTEXTER — Tue, 16 Feb 2021 13:21:39 GMT

yep, it's only during boot, and the array seems to be healthy otherwise. Not sure if I should be concerned about it or just ignore it?

> system ha interconnect status show

not sure where to run this. it looks like ha can either expand out to hardware or halt, but is not valid by itself, at least at my runlevel (at the cluster(?) prompt) Cdot is still pretty foreign to me, I mostly still work on 7-mode.

> cluster show

both nodes show true for health and true for eligibility, whatever that means, I assume it's good!

Re: NVRAM size mismatch between nodes detected

paul_stejskal — Tue, 16 Feb 2021 16:03:30 GMT

What is the serial #? It may be good to open a case if you have entitlements.

Re: NVRAM size mismatch between nodes detected

SEIMTEXTER — Tue, 16 Feb 2021 16:08:04 GMT

yeah we don't have entitlements or a support contract unfortunately. Seems like it's working fine, it just spits that error out on boot ¯\_(ツ)_/¯

Re: NVRAM size mismatch between nodes detected

andris — Tue, 16 Feb 2021 17:57:53 GMT

system ha interconnect status show is a privilege: advanced command.

::> set advanced

::*> system ha interconnect status show

Re: NVRAM size mismatch between nodes detected

navion — Mon, 26 Apr 2021 16:00:26 GMT

Also getting several nv.partner.size.mismatch on every ONTAP update.

Re: NVRAM size mismatch between nodes detected

paul_stejskal — Mon, 26 Apr 2021 16:21:26 GMT

I think it's normal. If one node is offline or powering up, the size will of course be different. I've always seen it and put it in the "that's normal output" category of my brain.

Re: NVRAM size mismatch between nodes detected

SEIMTEXTER — Mon, 26 Apr 2021 19:26:44 GMT

I'm with you 100% on that. we replaced the entire filer and the "error" persisted, but no visible alerts or performance issues related to that message. Thanks everyone!

Re: NVRAM size mismatch between nodes detected

navion — Tue, 27 Apr 2021 12:23:46 GMT

According to KB:

Cause
The interconnect is temporarily link up and down.

Solution
No action is required as it is automatically restored.

Re: NVRAM size mismatch between nodes detected

SEIMTEXTER — Tue, 27 Apr 2021 12:33:24 GMT

Thank you for that KB article, that's it exactly. If someone who works for NetApp can expand the list of affected systems, that would probably help others find it faster. Thanks again all.