I am running Windows 7 64 bit. I have 4 network external drives attached to my router via 2 Cisco NSLU2 servers. The drives connect when I boot the PC but after a while (it seems random) the drives just disconnect. I can click on my computer and bring the drives back one at a time. This is very troubling as I may be running a lengthy copy and it terminates due to this disconnect. I have no control over this action and need help on why this is happening. Added comment: Would the use of net commands be any help in understanding this problem? Added comment: The 2 Cisco NSLU2 servers are running Debian which is current. I also have a new Synology DS413j connected to my router with 4 WD internal drives installed. The drives in the DS413j also become disconnected randomly. Is there any way the networking function in Windows can be accessed to see what parameters are set? I fixed this problem by using http://support.microsoft.com/kb/297684. It is a timing problem as I suspected. I turned off the autodisconnect option.