Thank you. I fixed the issue by reinstalling SQL Server and reattaching databases. I believe the problem was caused by entering the max memory parameter (240MB instead of 240GB) incorrectly.

Administrative log was the most informative:

[sqsrvres] CheckQueryProcessorAlive: sqlexecdirect failed

[sqsrvres] printODBCError: sqlstate = HYT00; native error = 0; message = [Microsoft][SQL Server Native Client 10.0]Query timeout expired

[sqsrvres] CheckQueryProcessorAlive: sqlexecdirect failed

[sqsrvres] printODBCError:...

Thanks.

We were able to rebuild the raid and recover the data.

Thank you.

Killed the active connection to model and it worked.

Thank you