Hello Androsov, Can I get you to run a support bundle from the MDSM for the MD3200i.  I can send you a private message that you can reply back to.  Based on the error I would think that it is just an informational message but without looking at the log can’t tell what is causing the message.   Please let us know if you have any other questions.
Have Windows Server 2012 & Dell MD3200i iSCSI disk subsystem. I installe Dell software last version. In the event log I receved periodically next error: Source: Service Control Manager ID: 7031 The service Modular Disk Storage Hardware Provider was unexpectedly complete. It occurred 1 time(s). The following adjusting action will be undertaken in 60000 ms: Service restarting. What is the problem?  
Service Control Manager 7031