OCR Replacement-Replace Existing OCR Disk with New One-Oracle RAC 11GR2

OCR Replacement-Replace Existing OCR Disk with New One-Oracle RAC 11GR2

----------------------Prerequisite for Activity--------------

1.OCR Backup Manually & Automatically to other location:

You can use the ocrconfig -manualbackup command to force Oracle Clusterware to perform a backup of the OCR at any time, rather than wait for the automatic backup that occurs at 4-hour intervals.
3$GRID_HOME/bin
./ocrconfig -manualbackup
./ocrconfig -showbackup

2.Export OCR Backup

./ocrconfig -export /tmp/ocr_export_date.exp

3.Import OCR Backup

---------------------Voting Disk----------------------------------

1.Require 3 Luns of 500 Mb each of different-2 storage.

/dev/mapper/VOTE_V1  ---Violin Storage
/dev/mapper/VOTE_H1 ----Hitachi  Storage
/dev/mapper/VOTE_V2 ----Violin Storage
Create 3 Luns of 500Mb each. If possible put each Lun in different controller, array or storage.

2.DISK Creation from root user on one of the Node(node 1) i.e 1.***.43.**

2.1) For Voting

oracleasm createdisk VOTE_V1 /dev/mapper/VOTE_V1
oracleasm createdisk VOTE_H1 /dev/mapper/VOTE_H1
oracleasm createdisk VOTE_V2 /dev/mapper/VOTE_V2
oracleasm scandisks
oracleasm listdisks

3.SCAN DISK ON Another Node(node 2) i.e 1.***.43.** from root user.

oracleasm scandisks

4.Create Voting Diskgroup with NORMAL REDUNDANCY along with three failgroup.

CREATE DISKGROUP VOTE_GRP NORMAL REDUNDANCY
 FAILGROUP VOTE_FAIL_V1 DISK 'ORCL:VOTE_V1'
 FAILGROUP VOTE_FAIL_H1 DISK 'ORCL:VOTE_H1'
 FAILGROUP VOTE_FAIL_V2 DISK 'ORCL:VOTE_V2'
ATTRIBUTE 'compatible.asm' = '11.2.0.1.0';

---------------------OCR Disk----------------------------------

1.Require 2 Luns of 500 Mb each of different-2 storage.

/dev/mapper/CRS_V1  ---Violin Storage
/dev/mapper/CRS_H1  ----Hitachi  Storage

2.DISK Creation from root user on one of the Node 1 i.e 1.***.43.**

oracleasm createdisk CRS_V1 /dev/mapper/CRS_V1
oracleasm createdisk CRS_H1 /dev/mapper/CRS_H1
oracleasm scandisks
oracleasm listdisks

3.SCAN DISK ON Another Node(node 2) i.e 1.***.43.** from root user.

oracleasm scandisks

4.Create CRS Diskgroup with NORMAL REDUNDANCY along with two failgroup.

CREATE DISKGROUP CRS_GRP NORMAL REDUNDANCY
 FAILGROUP CRS_FAIL_V1 DISK 'ORCL:CRS_V1'
 FAILGROUP CRS_FAIL_H1 DISK 'ORCL:CRS_H1'
 ATTRIBUTE 'compatible.asm' = '11.2.0.1.0';

---------------------------------Verification----------------------------------

TO check Diskgroup Provissioned/Not

SET LINESIZE 150
 COL PATH FOR A30
COL NAME FOR A10
COL HEADER_STATUS FOR A20
COL FAILGROUP FOR A20
 COL FAILGROUP_TYPE FOR A20
COL VOTING_FILE FOR A20
SELECT  NAME,PATH,HEADER_STATUS,FAILGROUP, FAILGROUP_TYPE, VOTING_FILE
FROM  V$ASM_DISK
WHERE  GROUP_NUMBER IN ( SELECT GROUP_NUMBER FROM V$ASM_DISKGROUP WHERE NAME IN ('CRS_GRP','VOTE_GRP'));

             Mount the diskgroup on another node (node2)i.e 1.***.43.**-

#alter diskgroup VOTE_GRP mount;
#alter diskgroup CRS_GRP mount;

-----------------------CURRENT OCR/VOTING CONFIGURATION---------

------------------------OCR--------------------------------------

[root@NEWDB1 bin]# ./ocrcheck
Status of Oracle Cluster Registry is as follows :
Version : 3
Total space (kbytes) : 262120
Used space (kbytes) : 3768
Available space (kbytes) : 258352
ID : 1579853954
Device/File Name : +OCRDATA
Device/File integrity check succeeded
Device/File not configured
Device/File not configured
Device/File not configured
Device/File not configured
Cluster registry integrity check succeeded
Logical corruption check succeeded

------------------------VOTING--------------------------------------

[grid@NEWDB1 ~]$ crsctl query css votedisk
## STATE File Universal Id File Name Disk group
-- ----- ----------------- --------- ---------
1. ONLINE 8f6bd01f079d4f06bf3beb78f18e9bfc (ORCL:OCRDATA1) [OCRDATA]
Located 1 voting disk(s).

Moving Voting Files from existing disk group to New DiskGroup

This should be run during Maintaince Window.Instances should be down of all the nodes.

============From grid user under GRID_HOME

$crsctl replace votedisk VOTE_GRP   (VOTE_GRP is a new Diskgroup for Voting file)
$crsctl query css votedisk
To check current voting disk configuration
TO check Diskgroup Provissioned/Not
SET LINESIZE 150
COL PATH FOR A30
COL NAME FOR A10
COL HEADER_STATUS FOR A20
COL FAILGROUP FOR A20
COL FAILGROUP_TYPE FOR A20
COL VOTING_FILE FOR A20
SELECT  NAME,PATH,HEADER_STATUS,FAILGROUP, FAILGROUP_TYPE, VOTING_FILE
FROM  V$ASM_DISK
WHERE  GROUP_NUMBER IN ( SELECT GROUP_NUMBER FROM V$ASM_DISKGROUP WHERE NAME IN ('VOTE_GRP'));

Moving OCR Files from existing disk group to New DiskGroup

# /u01/app/11.2.0/grid/bin/ocrconfig -add +CRS_GRP
#/u01/app/11.2.0/grid/bin/ocrcheck
# /u01/app/11.2.0/grid/bin/ocrconfig -add +VOTE_GRP
#/u01/app/11.2.0/grid/bin/ocrcheck

--------------------Replace Existing OCR Disk with New One------------------------------

# ocrconfig -replace +OCRDATA -replacement +CRS_GRP

DELETE EARLIER DISKGROUP INFORMATION FROM OCR

#/u01/app/11.2.0/grid/bin/ocrconfig -delete +OCRDATA
#/u01/app/11.2.0/grid/bin/ocrcheck

=================DROP OLD OCR DISKGROUP LATER----------------------

login from grid user & connected as sys as sysasm
sql>alter diskgroup OCRDATA dismount;  #It should dismount before drop#####
sql>alter diskgroup OCRDATA mount;
sql>drop diskgroup OCRDATA including contents;