I have a Tera station TS-XL/R5. I have created a share I use to store CCTV files. The share works for about 12 hours before becoming un-accessble. You can view the share when to connect to \\NAS-Name or IP address but it will not let you open the share or either of the default shares (which I don't use).
There are no restrictions on the CCTV share. Once rebooted the share then works fine for about 12 - 24 hours before stopping again.
The share receives data from 3 100mb/s cameras via a GB switch so trafic volume should not be the issue.
The NIC appears to operating at GB speed.
It uses a fixed IP and is registed in the DNS correctly.
I am using the latest firmware version 1.20
Regards
Brendan