Accidentally deleted Central Inventory-How to re-create it?

Details:

Users: Oracle, Grid.
Homes: /u01/app/oracle/product/11.2.0/db_1 ,  /u01/app/11.2.0/grid
Local inventory: /u01/app/oracle/product/11.2.0/db_1/inventory ,  /u01/app/11.2.0/grid/inventory
Central inventory: /u01/app/oraInventory (it was accidentally deleted )

To Check:

0.

su  – oracle

1.

cd /u01/app/oracle/product/11.2.0/db_1/OPatch/

2.

./opatch lsinventory

Invoking OPatch 11.2.0.1.7

Oracle Interim Patch Installer version 11.2.0.1.7
Copyright (c) 2011, Oracle Corporation.  All rights reserved.

Oracle Home       : /u01/app/11.2.0/grid
Central Inventory : /u01/app/oraInventory
   from           : /etc/oraInst.loc
OPatch version    : 11.2.0.1.7
OUI version       : 11.2.0.3.0
Log file location : /u01/app/11.2.0/grid/cfgtoollogs/opatch/opatch2013-11-04_15-06-56PM.log

OPatch failed to locate Central Inventory.
Possible causes are:
    The Central Inventory is corrupted
    The oraInst.loc file specified is not valid.
LsInventorySession failed: OPatch failed to locate Central Inventory.
Possible causes are:
    The Central Inventory is corrupted
    The oraInst.loc file specified is not valid.

OPatch failed with error code 73

To Solve:

OUI is the great tool by which you can re-create Central or Local inventories.

Find the owner of the /u01/app folder. For me it is grid.

[oracle@oracle01 ~]$ ls -la /u01
total 12
drwxr-xr-x.  3 grid oinstall 4096 Sep 10 15:36 .
dr-xr-xr-x. 27 root root     4096 Oct 24 17:20 ..
drwxr-xr-x.  6 grid oinstall 4096 Nov  4 17:43 app

Login by the same user and run:

–To attach Oracle home

[grid@oracle01 ~]$ /u01/app/oracle/product/11.2.0/db_1/oui/bin/runInstaller -silent -attachHome -invPtrLoc /etc/oraInst.loc oracle_home="/u01/app/oracle/product/11.2.0/db_1" ORACLE_HOME_NAME="OraDb11g_home1"
Starting Oracle Universal Installer…

Checking swap space: must be greater than 500 MB.   Actual 8191 MB    Passed
The inventory pointer is located at /etc/oraInst.loc
The inventory is located at /u01/app/oraInventory
‘AttachHome’ was successful.

–To attach Grid home

[grid@oracle01 ~]$ /u01/app/11.2.0/grid/oui/bin/runInstaller -silent -attachHome -invPtrLoc /etc/oraInst.loc oracle_home="/u01/app/11.2.0/grid" ORACLE_HOME_NAME="Ora11g_gridinfrahome1"
Starting Oracle Universal Installer…

Checking swap space: must be greater than 500 MB.   Actual 8191 MB    Passed
The inventory pointer is located at /etc/oraInst.loc
The inventory is located at /u01/app/oraInventory
‘AttachHome’ was successful.

 

Check again:

[oracle@oracle01 OPatch]$ ./opatch lsinventory -all
Invoking OPatch 11.2.0.1.7

Oracle Interim Patch Installer version 11.2.0.1.7
Copyright (c) 2011, Oracle Corporation.  All rights reserved.

Oracle Home       : /u01/app/oracle/product/11.2.0/db_1
Central Inventory : /u01/app/oraInventory
   from           : /etc/oraInst.loc
OPatch version    : 11.2.0.1.7
OUI version       : 11.2.0.3.0
Log file location : /u01/app/oracle/product/11.2.0/db_1/cfgtoollogs/opatch/opatch2013-11-04_18-01-36PM.log

Lsinventory Output file location : /u01/app/oracle/product/11.2.0/db_1/cfgtoollogs/opatch/lsinv/lsinventory2013-11-04_18-01-36PM.txt

——————————————————————————–
List of Oracle Homes:
  Name          Location
   Ora11g_gridinfrahome1         /u01/app/11.2.0/grid
   OraDb11g_home1         /u01/app/oracle/product/11.2.0/db_1

Installed Top-level Products (1):

Oracle Database 11g                                                  11.2.0.3.0
There are 1 products installed in this Oracle Home.

There are no Interim patches installed in this Oracle Home.

——————————————————————————–

OPatch succeeded.