Hi Marty,

If your NFS storage do not handle client failover event, you will try to use 
NFSv3 with TCP, it should work.

Regards,
Levin
On 14 Nov 2025 at 07:25 +0800, Marty Godsey <[email protected]>, wrote:
> Hello everyone.
>
> So, I am learning, or reading at least, that QCOW2 file format, running a 
> shared NFS storage that’s HA, does not to like to failover.
>
> I have an HA NAS running NFS 4.1 and everything works fine until I test the 
> failure scenario of a failover on the storage nodes. When I do this, the 
> entire VM locks up and must be hard reset to recover.
>
> Is this true? Do people not use QCOW2 on HA NFS storage? Are there time outs 
> I can set, etc..
>
> Thank you for all the input.
>
>
> Marty
>

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