We have a Windows 2008 R2 server which has just recently started locking up seemingly randomly each day. It started happening a few days ago after the server has been up and running for 260 days straight. What happens is this:
We have two partitions on the server running under the same RAID 1 mirror. The "Data" partition will not be accessible if I go into Computer and double click the partition, Explorer will sit there and spin until Explorer displays "Not Responding." At this point, no one can connect to the network shares and if I try to restart the server, it gets stuck at "Please wait for the System Event Notification Service" indefinitely and someone has to hold the power button to turn that server off. Once it comes back up it works for a few hours and the same thing happens. There is nothing in Event Viewer that helps point me in the right direction.
The server is a Dell PowerEdge with Open Manage installed. Open Manage does not show any problems.
Any ideas on what's going on and how to fix it?