SQLServer and network shares

Hi,

My SQL server is short on disk space and I need to create a new instance
of SQLServer. I had another server running Linux with enough space left
so i create a new partition on it and shared it through SAMBA.
Now I can use this shared disk in RW mode from the SQL server (tested OK).
However, when i try to create another database on this network share,
SQLServer denies the operation.
Does anybody have a clue about what's going on?
Isn't it possible to set database files on a network share?

Regards.

CH COLLIN