Data change made on a local mount of vhd don't appear on remote server connected throw initiator

Hi,

I have two server dbtor3 and dbtor2. 

Dbtor3 have iscsi Target installed and the virtual disk is also mounted locally.

Dbtor2 have access to this same virtual disk throw iscsi initiator.

When i add a file the virtual disk throw the local mount ( on dbtor3) it's not showing up on dbtor2.

Does any body have an idea ?

All the best 

Vincent