Exadata, how to restart cell services properly

We don't restart cell services too much often if cell works fine :-). But if we want to restart cell services and you don't expect ASM instance to be affected, or you don't want vm node eviction (in the worst case) , we must do it properly. 

[root@cell01 ~]# cellcli -e LIST GRIDDISK ATTRIBUTES name,asmmodestatus,asmdeactivationoutcome
....                                                                                                       
DAT2_CD_01_cell01     ONLINE          Yes
DAT2_CD_02_cell01     ONLINE          Yes         <==== must be YES
DAT2_CD_03_cell01     ONLINE          Yes
……

[root@cell01 ~]# cellcli -e ALTER GRIDDISK ALL INACTIVE
GridDisk ACFSIHBHA2_CD_00_cell01 successfully altered
…..


[root@cell01 ~]# cellcli -e LIST GRIDDISK ATTRIBUTES name, asmmodestatus, asmdeactivationoutcome
...
DAT2_CD_03_cell01     OFFLINE         Yes          <==== must be OFFLINE/UNUSED and YES
DAT2_CD_04_cell01     OFFLINE         Yes
 ...


[root@cell01 ~]# cellcli -e LIST GRIDDISK
DATA_CD_00_cell01     inactive          <==== must be inactive
...

[root@cell01 ~]# cellcli -e ALTER CELL SHUTDOWN SERVICES ALL
Stopping the RS, CELLSRV, and MS services...
The SHUTDOWN of services was successful.

#check service 
[root@cell01 ~]# cellcli -e list cell attributes rsStatus, msStatus, cellsrvStatus detail
rsStatus:               stopped
msStatus:               unknown
cellsrvStatus:          unknown

Start cell services

[root@cell01 ~]# cellcli -e ALTER CELL STARTUP SERVICES ALL
Starting the RS, CELLSRV, and MS services...
Getting the state of RS services...  running
Starting CELLSRV services...
The STARTUP of CELLSRV services was successful.
Starting MS services...
The STARTUP of MS services was successful.


[root@cell01 ~]#  cellcli -e ALTER GRIDDISK ALL ACTIVE
…
GridDisk DAT2_CD_00_cell01 successfully altered

...

[root@cell01 ~]# cellcli -e LIST GRIDDISK
DAT2_CD_01_cell01     active
DAT2_CD_02_cell01     active

		 
[root@cell01 ~]#  cellcli -e LIST GRIDDISK ATTRIBUTES name, asmmodestatus

...
DATA_CD_02_cel01     ONLINE
....