Hi 

we have noticed a large spike in disk i/o relating to our scom agents. The health service is constantly reading at around 5-10mb/sec across all our monitored servers. We linked this to last time that we performed a datacentre shutdown. We can see the spike from from the days after the shutdown.I have unfortunately inherited scom from someone else so my knowledge of scom is not the greatest at this point. Any help will gladly be appreciated.We have tried restarting the service on the monitored servers.

We are using SCOM 2012 R2

This could be because of many unwanted rules and monitoring running. Kill the HealthService.exe process on the SERVER where you have high I/O Reads, rename the health service folder and then restart the service.

also check this link for resolutions -

http://blogs.technet.com/b/momteam/archive/2012/04/17/kb-how-to-troubleshoot-event-id-2115-in-operations-manager.aspx