If you are trying to mount an NFS share on a Linux system and you see an error message that says "wrong fs type, bad option, bad superblock on fs2:/data3," it usually means that there is a problem with the NFS share or with the configuration of the mount.
To fix this error, you can try the following steps:
Check the status of the NFS server. Make sure that the NFS server is running and that the share you are trying to mount is available. You can use the showmount -e command to list the available shares on the NFS server.
Check the configuration of the mount. Make sure that the mount options and filesystem type specified in the /etc/fstab file are correct. The filesystem type for NFS mounts is usually nfs, and the options are usually rw, async, or sync.
Check the network connection. Make sure that the client and the server are able to communicate over the network. You can use the ping command to test the network connection.
Check the firewall rules. If you have a firewall enabled on the client or the server, make sure that it is configured to allow NFS traffic.
Check the permissions on NFS server.