Hello Anuj - this is perfectly normal behavior for any mountpoint. WHen the volume is mounted you can see the data on the volume, but when it is not, the mountpoint is still there as a local directory.

Are there any chaces of data loss in a situation where the mountpoint is on Node1 but visible to node2 and someone creates a new folder through ndoe2?

It is actually not visible on node2. Whatever you create on node2 will be created on the local disk. Once mounted you will se the content of the shared volume. No data will be lost in any case but you will not see the local files as long as the shared volume is mounted.

I'm not sure about SUN but with AIX, if you were to create a directory or file in the mount point directory while the datasource was NOT attached (file system not mounted) then the next time you attach the datasource it will attach but you won't see any data.

The mountpoint directory must be empty then you can mount the filesystem and see your data. I had an instance where somehow, the datasource test ran and created the .FT_RESPONSE_TEST directory BEFORE the datasource was attached. So when it did attach, it appeared as though all of the data was gone. So I had to detach the datasource, delete the .FT_RESPONSE_TEST and lost+found directories. Then I attached the datasource and the filesystem was mounted properly.

Again this was AIX and I'm not sure if SUN will let you mount a filesystem when it isn't empty. Does that make any sense?