Work Life Balance

                                                       
                Saiket , a computer engineer aged just less than 30 staying with his family including his wife Renuka , son Ansh in rented house in a City. Nearby to his house his parents as well as in-laws were staying. Having parents nearby was good source of support when Ansh was born and growing. Saiket was working for an IT firm over 5 yrs which is considered amongst the top industries.

ORA-15018: diskgroup cannot be created

Errrors:

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.

oracle database corrupt block recovery

Error:

Corrupt block relative dba: 0x1a0975d9 (file 104, block 619993)
Bad check value found during user buffer read
Data in bad block:
 type: 6 format: 2 rdba: 0x1a0975d9
 last change scn: 0x0726.9a3a3fc5 seq: 0x1 flg: 0x06
 spare1: 0x0 spare2: 0x0 spare3: 0x0
 consistency value in tail: 0x3fc50601
 check value in block header: 0x287e
 computed block checksum: 0xfe81
Reread of rdba: 0x1a0975d9 (file 104, block 619993) found same corrupted data
Tue Feb 18 20:17:59 IST 2014
Corrupt Block Found
         TSN = 47, TSNAME = EVENT_TAB
         RFN = 104, BLK = 619993, RDBA = 436827609
         OBJN = 141322, OBJD = 141322, OBJECT = EVENT_PK, SUBOBJECT =
         SEGMENT OWNER = EVA_ADMIN, SEGMENT TYPE = Index Segment


Background:

ORA-15063: ASM discovered an insufficient number of disks for diskgroup

Error:

ERROR: diskgroup DG02 was not mounted
ORA-15032: not all alterations performed
ORA-15017: diskgroup "DG02" cannot be mounted
ORA-15063: ASM discovered an insufficient number of disks for diskgroup "DG02"
ORA-15080: synchronous I/O operation to a disk failed
ORA-27061: waiting for async I/Os failed
Linux-x86_64 Error: 5: Input/output error
Additional information: -1
Additional information: 4096
WARNING: Read Failed. group:0 disk:0 AU:0 offset:0 size:4096
ERROR: no read quorum in group: required 2, found 0 disks
ERROR: -9(Error 27061, OS Error (Linux-x86_64 Error: 5: Input/output error