Try to Connect NVR Specifically Hikvision to TrueNas NFS v3.
Grant all access to 777 and mapuser to dataset directory owner cctv:cctv
Mount is OK. During Format get error.
Using Wireshark got V3 ACCESS Reply [Access Denied: XE], [Allowed: RD MD XT XAR XAW XAL] How to get Truenas to allow XE?