How to clear Exadata Storage Alerts

There are times you need to clear Exadata storage alerts. Its very important that you investigate and resolve the issue before clearing any storage  alers.  Additionally, you want to make a note of storage alert before you clear that alert. You can follow below steps to clear storage alert on one or all storage cells

Step 1 : Login to cellcli utility 

[root@cell01 ~]# cellcli
CellCLI: Release 18.1.4.0.0 - Production on Wed Jun 27 19:32:28 EDT 2018

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Step 2 : Validate cell configuration 

CellCLI> ALTER CELL VALIDATE CONFIGURATION ;
Cell exceladm01 successfully altered

Step 3 : List Exadata Storage Alerts 

CellCLI> list alerthistory
1 2018-06-13T11:09:48-04:00 critical "ORA-00700: soft internal error, arguments: [main_21], [11], [Not enough open file descriptors], [], [], [], [], [], [], [], [], []"
2 2018-06-13T11:35:06-04:00 critical "RS-700 [No IP found in Exadata config file] [Check cellinit.ora] [] [] [] [] [] [] [] [] [] []"
3_1 2018-06-25T13:26:17-04:00 critical "Configuration check discovered the following problems: Verify network configuration: 

3_2 2018-06-26T13:25:17-04:00 clear "The configuration check was successful."

Step 4 : Drop all Storage alerts 

CellCLI> drop alerthistory all
Alert 1 successfully dropped
Alert 2 successfully dropped

Step 5 : List storage alerts to validate they are gone

CellCLI> list alerthistory

CellCLI> exit
quitting

Step 6 : Repeat above steps on all storage cells