ORA-15018: diskgroup cannot be created


SQL> create diskgroup DG03 external redundancy disk '/dev/abc' attribute 'compatible.asm'='11.2';

create diskgroup DG03 external redundancy disk '/dev/abc' attribute 'compatible.asm'='11.2'


ORA-15018: diskgroup cannot be created

ORA-15031: disk specification '/dev/abc' matches no disks

ORA-15025: could not open disk "/dev/abc"

ORA-15056: additional error message

Linux-x86_64 Error: 13: Permission denied

Cause: Permission of the raw device path as root

Installing OEM 12c on Linux

Oracle Enterprise Manager 12c cloud control installation

1. Architecture :

2. Background :

Oracle Management Agent (Management Agent/OMA)

The Management Agent is an integral software component that enables you to convert an un-managed host to a managed host in the Enterprise Manager system. The Management Agent works in conjunction with the plug-ins to monitor the targets running on that managed host.

Oracle Management Service (OMS)

The OMS is a Web-based application that orchestrates with the Management Agents and the Plug-Ins to discover targets, monitor and manage them, and store the collected information in a repository for future reference and analysis. The OMS also renders the user interface for Enterprise Manager Cloud Control. The OMS is deployed to the Oracle Middleware home (Middleware home), which is the parent directory that has the Oracle WebLogic Server home, the OMS home, the Management Agent home, the plug-in home, the Java Development Kit (JDK), the OMS instance base directory, the Oracle WT directory, the Oracle Common directory, and other relevant configuration files and directories. While deploying the OMS, the Enterprise Manager Cloud Control Installation Wizard installs Oracle WebLogic Server if it does not already exist in your environment. As a result, a WebLogic Server admin console is also installed.