To See the Exadata Storage cell status we can run the following command : CellCLI> list cell detail At the bottom of output there are following three lines to indicate the exadata storage software components and status cellsrvStatus: running msStatus: running rsStatus: running Which represent that exadata storage is running fine. This morning I was getting CELL-02559:There is a communication error between MS and CELLSRV. I have restarted the services and then it becomes in good state again. CellCLI> alter cell restart services all