error while trying add new domain storage tab

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i have issue when i trying to add new storage (new domain) i got error code like pic below...

my rhel ip
my rhev ip
my /etc/exports on rhel

please help me


make new storage for the first time

Unfortunately the image you included is quite small and challenging to read. I'll assume you want to add a Data Domain (and not the ISO Domain).

Did you export the NFS share from your Hypervisor (rhel?) Or is that a separate host?

You need to make sure that the share is owned by vdsm:kvm (36:36) and allows the Hypervisors to mount them directly (via your /etc/exports)