If you are working on RHEL, then to use the disk in ASM diskgroup, the disks need to be labeled with ASM. Earlier oracleasm utility was used for this purpose. But oracle developed its own ASM filter driver(AFD), which can be used for this . SEE ALSO : Oracleasm utility in oracle 1. First check […]

Recently we found that, one of our asm instance was using a different spfile. So used below steps to change the spfile. existing spfile – > /u01/app/grid/dbs/asmbackup.ora new spfile        – > +OCR_VOTING/CLUSTER/ASMPARAMETERFILE/spfileASM.ora 1. Find the current spfile of asm: export ORACLE_SID=+ASM1 sqlplus / as sysdba SQL> show parameter pfile NAME TYPE VALUE […]

This tutorial explains how to delete a node from a multi node grid infrastructure setup. Current GRID NODES  -> DBHOST3( node 1) , DBHOST4 ( node 2) Node to be deleted -> DBHOST4 Grid version -> 19c STEPS OVERVIEW: Precheck Delete the instance from DBHOST4  using dbca Deinstall the oracle database home from DBHOST4 Deinstall […]

In this article , we will explain the steps required for deinstalling 2 node grid infrastructure. STEPS OVERVIEW: Deinstall oracle database homes if any Deinstall grid infrastructure Manually delete grid_home and oracle_home if anything is reported at 2nd stage. NOTE – > This deinstall process, will drop the database. So if your data is critical […]

Below are the steps for adding  a node in  oracle 19c RAC. STEP OVERVIEW: Add the new node  using gridSetup.sh Extend oracle database home to new node using addnode.sh Add the database instance  to new node using dbca DEMO In this demo, we will add new node dbhost04, to existing node dbhost03( where grid is […]

PROBLEM: While creating a diskgroup , got ORA-15260: permission denied on ASM disk group error. [oracle@19c]$ sqlplus / as SYSDBA SQL*Plus: Release 19.0.0.0.0 – Production on Fri Jun 18 18:42:58 2021 Version 19.3.0.0.0 Copyright (c) 1982, 2019, Oracle. All rights reserved. Connected to: Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 – Production Version 19.3.0.0.0 SQL> […]

This article contains the list of useful asmcmd commands which will come handy in your day to day operations. 1. List all diskgroups: ASMCMD> lsdg — Include dismounted diskgroups: ASMCMD> lsdg –discovery — List diskgroups across all nodes of cluster: ASMCMD> lsdg -g –discovery 2. List asm disks: — List all asm disks ASMCMD> lsdsk […]

NOTE – You can follow this method for deinstall and reinstall of  grid infrastructure without losing your database data(asm disk data)   Changing the cluster_name in ORACLE RAC means grid infrastructure need to be reconfigured( which is a complex activity). You will need downtime to do this activity and you will lose your cluster services, […]

PROBLEM: While shutting down crs, got below error. [root@bin]# ./crsctl stop crs CRS-4013: This command is not supported in a single-node configuration. CRS-4000: Command Stop failed, or completed with errors. SOLUTION: In case of standalone grid, there will not be any crs . Only has component will be there. So use the below command to […]

PROBLEM: While running oracle grid precheck using runcluvfy script, got below error. Verifying Daemon “avahi-daemon” not configured and running … Node Name Configured Status ———— ———————— ———————— dbatest2 no passed dbatest1 no passed Node Name Running? Status ———— ———————— ———————— dbatest2 yes failed dbatest1 yes failed Verifying Daemon “avahi-daemon” not configured and running …FAILED (PRVG-1360) […]