We have 2 TerraStation 5600 replicated together with a RAID array. We have them hooked up to our Active Directory domain for authentication. Users can copy and move files, but after 5-10 minutes it freezes up access to all the shares and says "Directory name invalid." We have tried using Windows, xcopy and robocopy and all have the same problem. Can you anyone help me troubleshoot this, please? Thank you!