Recovery case of OCR disk from ocr own backup.
$ crs_stat -t
Name          
Type           Target    State    
Host
------------------------------------------------------------
ora.ibm.db    
application    ONLINE    ONLINE   
labtest02
ora....m1.inst application    ONLINE   
ONLINE    labtest01
ora....m2.inst application    ONLINE   
ONLINE    labtest02
ora....SM1.asm application    ONLINE   
ONLINE    labtest01
ora....01.lsnr application    ONLINE   
ONLINE    labtest01
ora....t01.gsd application    ONLINE   
ONLINE    labtest01
ora....t01.ons application    ONLINE   
ONLINE    labtest01
ora....t01.vip application    ONLINE   
ONLINE    labtest01
ora....SM2.asm application    ONLINE   
ONLINE    labtest02
ora....02.lsnr application    ONLINE   
ONLINE    labtest02
ora....t02.gsd application    ONLINE   
ONLINE    labtest02
ora....t02.ons application    ONLINE   
ONLINE    labtest02
ora....t02.vip application    ONLINE   
ONLINE    labtest02
$
$
$ ocrcheck
Status of Oracle Cluster Registry is as follows :
        
Version                  :          2
         Total
space (kbytes)     :     307112
         Used
space (kbytes)      :       3812
        
Available space (kbytes) :    
303300
        
ID                       :  992671071
        
Device/File Name         :
/dev/rhdiskpower1
                                    Device/File
integrity check succeeded
        
Device/File Name         :
/dev/rhdiskpower2
                                    Device/File
integrity check succeeded
        
Cluster registry integrity check succeeded
$ orcconfig -showbackup
ksh: orcconfig: 
not found
$ ocrconfig -showbackup
labtest02    
2010/02/06 11:40:44    
/u01/app/oracle/product/10.2.0/crs/cdata/crs
labtest02    
2010/02/06 07:40:44    
/u01/app/oracle/product/10.2.0/crs/cdata/crs
labtest02    
2010/02/06 03:40:43    
/u01/app/oracle/product/10.2.0/crs/cdata/crs
labtest02    
2010/02/05 07:40:41     /u01/app/oracle/product/10.2.0/crs/cdata/crs
labtest02    
2010/01/26 04:53:33    
/u01/app/oracle/product/10.2.0/crs/cdata/crs
##################
Now we format ocr disk...
$ sudo su -
Password:
#
# pwd
/
# dd if=/dev/zero of=/dev/rhdiskpower1 bs=8192
count=25000
25000+0 records in
25000+0 records out
# dd if=/dev/zero of=/dev/rhdiskpower1 bs=8192
count=25000
25000+0 records in
25000+0 records out
# dd if=/dev/zero of=/dev/rhdiskpower2 bs=8192
count=25000
25000+0 records in
25000+0 records out
######################
$ crs_stat -t
Name          
Type           Target    State    
Host
------------------------------------------------------------
ora.ibm.db    
application    ONLINE    ONLINE   
labtest02
ora....m1.inst application    ONLINE   
ONLINE    labtest01
ora....m2.inst application    ONLINE   
ONLINE    labtest02
ora....SM1.asm application    ONLINE   
ONLINE    labtest01
ora....01.lsnr application    ONLINE   
ONLINE    labtest01
ora....t01.gsd application    ONLINE   
ONLINE    labtest01
ora....t01.ons application    ONLINE   
ONLINE    labtest01
ora....t01.vip application    ONLINE   
ONLINE    labtest01
ora....SM2.asm application    ONLINE   
ONLINE    labtest02
ora....02.lsnr application    ONLINE   
ONLINE    labtest02
ora....t02.gsd application    ONLINE   
ONLINE    labtest02
ora....t02.ons application    ONLINE   
ONLINE    labtest02
ora....t02.vip application    ONLINE   
ONLINE    labtest02
$ uname -n
labtest01
$ srvctl stop listener -n labtest01
PRKH-1010 : Unable to communicate with CRS services.
  [OCR
Error(Native: prsr_initCLSS:[21])]
$ crs_stat -t
CRS-0184: Cannot communicate with the CRS daemon.
$ ocrconfig -restore
/u01/app/oracle/product/10.2.0/crs/cdata/crs/day.ocr
PROT-20: Insufficient permission to proceed. Require
privileged user
###################
 with root
privilage:-
# cd /u01/app/oracle/product/10.2.0/crs
# cd bin
# ./ocrconfig -restore
/u01/app/oracle/product/10.2.0/crs/cdata/crs/day.ocr
# echo $?
0
# ./crsctl start crs
Attempting to start CRS stack
The CRS stack will be started shortly
######################
$ crs_stat -t
CRS-0184: Cannot communicate with the CRS daemon.
$  crs_stat -t
CRS-0184: Cannot communicate with the CRS daemon.
$ crs_stat -t
CRS-0184: Cannot communicate with the CRS daemon.
$ crs_stat -t
CRS-0184: Cannot communicate with the CRS daemon.
$ crs_stat -t
Name          
Type           Target    State    
Host
------------------------------------------------------------
ora.debs.db   
application    ONLINE    ONLINE   
labtest02
ora....debs.cs application    ONLINE   
ONLINE    labtest01
ora....bs1.srv application    ONLINE   
OFFLINE
ora....s1.inst application    ONLINE   
OFFLINE
ora....s2.inst application    ONLINE   
OFFLINE
ora....SM1.asm application    ONLINE   
ONLINE    labtest01
ora....01.lsnr application    ONLINE   
ONLINE    labtest01
ora....t01.gsd application    ONLINE   
ONLINE    labtest01
ora....t01.ons application    ONLINE   
ONLINE    labtest01
ora....t01.vip application    ONLINE   
ONLINE    labtest01
ora....SM2.asm application    ONLINE   
ONLINE    labtest02
ora....02.lsnr application    ONLINE   
ONLINE    labtest02
ora....t02.gsd application    ONLINE   
ONLINE    labtest02
ora....t02.ons application    ONLINE   
ONLINE    labtest02
ora....t02.vip application    ONLINE   
ONLINE    labtest02
ora....andh.db application    ONLINE   
ONLINE    labtest01
ora....h1.inst application    ONLINE   
OFFLINE
ora....h2.inst application    ONLINE   
OFFLINE
$ ocrcheck
Status of Oracle Cluster Registry is as follows :
        
Version                  :          2
         Total
space (kbytes)     :     307112
         Used
space (kbytes)      :       5128
        
Available space (kbytes) :    
301984
        
ID                       :  992671071
        
Device/File Name         :
/dev/rhdiskpower1
                                    Device/File
integrity check succeeded
        
Device/File Name         :
/dev/rhdiskpower2
                                    Device/File integrity
check succeeded
        
Cluster registry integrity check succeeded
$ sqlplus
SQL*Plus: Release 10.2.0.1.0 - Production on Sat Feb
6 14:44:27 2012
Copyright (c) 1982, 2005, Oracle.  All rights reserved.
Enter user-name: / as sysdba
Connected to:
Oracle Database 10g Enterprise Edition Release
10.2.0.1.0 - 64bit Production
With the Partitioning, Real Application Clusters,
OLAP and Data Mining options
SQL> select open_mode from v$database;
OPEN_MODE
----------
READ WRITE
SQL>
********************************************************************
From OCR export backup:
$ crs_stat -t
Name           Type           Target    State    
Host
------------------------------------------------------------
ora.debs.db    application    OFFLINE  
OFFLINE
ora....debs.cs application   
OFFLINE   OFFLINE
ora....bs1.srv application   
ONLINE    OFFLINE
ora....s1.inst application   
ONLINE    OFFLINE
ora....s2.inst application   
ONLINE    OFFLINE
ora....SM1.asm application   
ONLINE    ONLINE    labtest01
ora....01.lsnr application   
ONLINE    ONLINE    labtest01
ora....t01.gsd application   
ONLINE    ONLINE    labtest01
ora....t01.ons application   
ONLINE    ONLINE    labtest01
ora....t01.vip application   
ONLINE    ONLINE    labtest01
ora....SM2.asm application   
ONLINE    ONLINE    labtest02
ora....02.lsnr application   
ONLINE    ONLINE    labtest02
ora....t02.gsd application   
ONLINE    ONLINE    labtest02
ora....t02.ons application   
ONLINE    ONLINE    labtest02
ora....t02.vip application   
ONLINE    ONLINE    labtest02
ora....andh.db application   
OFFLINE   OFFLINE
ora....h1.inst application   
ONLINE    OFFLINE
ora....h2.inst application   
ONLINE    OFFLINE
$
$ ocrcheck
Status of Oracle Cluster Registry is as follows :
         Version                  :          2
         Total space
(kbytes)     :     307112
         Used space
(kbytes)      :       5136
         Available space
(kbytes) :     301976
         ID                       :  992671071
         Device/File
Name         : /dev/rhdiskpower1
                                   
Device/File integrity check succeeded
         Device/File
Name         : /dev/rhdiskpower2
                                   
Device/File integrity check succeeded
         Cluster registry
integrity check succeeded
$ ls -lt /u01
total 0
drwxr-xr-x    2 oracle   oinstall        256 Jan 20 16:20 cron_script
drwxrwx---    3 oracle   oinstall        256 Jan 12 16:17 app
drwxr-xr-x    2 root     system          256 Jan  7 16:10 lost+found
$ cd /u01/app
$ ls
oracle
$ mkdir ocr
$ ls
ocr     oracle
$ ls -lt
total 0
drwxr-xr-x    2 oracle   oinstall        256 Feb 
6 15:09 ocr
drwxrwx---    3 oracle   oinstall        256 Jan 12 16:17 oracle
$ cd ocr
$ pwd
/u01/app/ocr
$ ocrconfig -export /u01/app/ocr/ocr-export.dmp
PROT-20: Insufficient permission to proceed. Require privileged
user
######################
# pwd
/u01/app/oracle/product/10.2.0/crs/bin
# ./ocrconfig -export /u01/app/ocr/ocr-export.dmp
# dd if=/dev/zero of=/dev/rhdiskpower1 bs=8192 count=25000
25000+0 records in
25000+0 records out
# dd if=/dev/zero of=/dev/rhdiskpower2 bs=8192 count=25000
25000+0 records in
25000+0 records out
# ./ocrconfig -import /u01/app/ocr/ocr-export.dmp
# ./crsctl start crs
Attempting to start CRS stack
The CRS stack will be started shortly
#################
$ crs_stat -t
CRS-0184: Cannot communicate with the CRS daemon.
$ crs_stat -t
Name           Type           Target    State    
Host
------------------------------------------------------------
ora.debs.db   
application    OFFLINE   OFFLINE
ora....debs.cs application   
OFFLINE   OFFLINE
ora....bs1.srv application   
ONLINE    OFFLINE
ora....s1.inst application   
ONLINE    OFFLINE
ora....s2.inst application   
ONLINE    OFFLINE
ora....SM1.asm application   
ONLINE    ONLINE    labtest01
ora....01.lsnr application   
ONLINE    ONLINE    labtest01
ora....t01.gsd application   
ONLINE    ONLINE    labtest01
ora....t01.ons application   
ONLINE    ONLINE    labtest01
ora....t01.vip application   
ONLINE    ONLINE    labtest01
ora....SM2.asm application   
ONLINE    ONLINE    labtest02
ora....02.lsnr application   
ONLINE    ONLINE    labtest02
ora....t02.gsd application   
ONLINE    ONLINE    labtest02
ora....t02.ons application   
ONLINE    ONLINE    labtest02
ora....t02.vip application   
ONLINE    ONLINE    labtest02
ora....andh.db application   
OFFLINE   OFFLINE
ora....h1.inst application   
ONLINE    OFFLINE
ora....h2.inst application    ONLINE   
OFFLINE
 
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