SDCs not seeing the files on the same volume under same mount point

Hi,

We have three SDC clients currently. All three SDC clients are mounting a scaleio volume at /mnt/vol1. Now, when we create a file test.txt in one of the SDC clients under /mnt/vol1, it does not reflect on the other two SDC clients under /mnt/vol1. Are we missing something ? Are there any additional configurations to be done, so the volume (with the created files) is shared across the SDCs ?