I'm running SBS 2008 as a file server, SQL server, IIS7 Server, and Exchange server, and very recently I am getting some very confusing stalls on it. During these "stalls," file services will cause any program with a file opened on a network drive (say like MS word or Excel) to hang, and report to Windows that the program is no longer responding. HTTP requests to the server will go unanswered and timeout, as will RDP connections. Oddly enough, Exchange via Outlook seems fine during these periods, as does SQL.
Now, the really strange part to me: We run this on a Dell server, and if I try to connect to IDRAC when this happens, those connections time out as well. Eventually, the server will right itself, and everything will be OK for days or even weeks.
The event log is (typically) unhelpful. I'm wondering where I should start to troubleshoot this?