How to move the OCR diskgroup contents to another group online in a RAC enviornment

Sometime due to some reason we may need to move the ocr contents to new diskgroup , the reason could be like Asm lable is wrong,diskmapper is wrong,disk is having problem,disk location need to be changed,

1. Check the current Disk Group name

[root@ocservera 11.2.0.2]# ocrcheck

Status of Oracle Cluster Registry is as follows :

Version : 3

Total space (kbytes) : 262120

Used space (kbytes) : 3284

Available space (kbytes) : 258836

ID : 1837802780

Device/File Name : +OCR

Device/File integrity check succeeded

Device/File not configured

Cluster registry integrity check succeeded

Logical corruption check succeeded

2. Create another diskgroup

CREATE DISKGROUP OCR1

external redundancy

disk 'ORCL:ASM_DISK_0011',

'ORCL:ASM_DISK_0012',

attribute 'compatible.asm' = '11.2',

'compatible.advm' = '11.2'

Diskgroup created.

3. Verify through asmcmd or sqlplus

ASMCMD> lsdg

State Type Rebal Sector Block AU Total_MB Free_MB Req_mir_free_MB Usable_file_MB Offline_disks Voting_files Name

MOUNTED NORMAL N 512 4096 1048576 3057 1372 563 404 0 Y OCR/

MOUNTED NORMAL N 512 4096 1048576 558030 556983 349 278317 0 N OCR1/

ASMCMD> exit

4. Add the OCR to the new DISK group

[root@ocservera 11.2.0.2]# ocrconfig -add +OCR1

5 . Verify if new disk has been added.

[root@ocservera 11.2.0.2]# ocrcheck

Status of Oracle Cluster Registry is as follows :

Version : 3

Total space (kbytes) : 262120

Used space (kbytes) : 3304

Available space (kbytes) : 258816

ID : 1837802780

Device/File Name : +OCR

Device/File integrity check succeeded

Device/File Name : +OCR1

Device/File integrity check succeeded

Device/File not configured

Cluster registry integrity check succeeded

Logical corruption check succeeded

6. Delete the ocr from the old diskgroup

[root@ocservera 11.2.0.2]# ocrconfig -delete +OCR

7. Check ocr is moved to new diskgroup

[root@ocservera 11.2.0.2]# ocrcheck

Status of Oracle Cluster Registry is as follows :

Version : 3

Total space (kbytes) : 262120

Used space (kbytes) : 3304

Available space (kbytes) : 258816

ID : 1837802780

Device/File Name : +OCR1

Device/File integrity check succeeded

Device/File not configured

Cluster registry integrity check succeeded

Logical corruption check succeeded

8. Move the voting disk from the current diskgroup to new diskgroup

8.1 Verify the current location

crsctl query css votedisk

## STATE File Universal Id File Name Disk group

-- ----- ----------------- --------- ---------

1. ONLINE a63ccacdc0b84f6cbfeeeee913657936 (ORCL:ASM_OCR_0001P1) [OCR]

2. ONLINE 15f320594b7d4fbdbf6fb952b3665683 (ORCL:ASM_OCR_0002P1) [OCR]

3. ONLINE 1e80bcca0d994fc5bfc403e9ce01b951 (ORCL:ASM_OCR_0003P1) [OCR]

8.2 replcate the disk group.

crsctl replace votedisk +OCR1

Successful addition of voting disk 1a8593de9c654f77bf7d55440dc20ce0.

Successful addition of voting disk 49e5d45ebe874f7fbfbc514fa51cc641.

Successful addition of voting disk 248240fba9784f57bf2021416760d415.

Successful deletion of voting disk a63ccacdc0b84f6cbfeeeee913657936.

Successful deletion of voting disk 15f320594b7d4fbdbf6fb952b3665683.

Successful deletion of voting disk 1e80bcca0d994fc5bfc403e9ce01b951.

Successfully replaced voting disk group with +OCR1.

CRS-4266: Voting file(s) successfully replaced

8.3 verify the current location

[oragrid@ocservera ~]$ crsctl query css votedisk

## STATE File Universal Id File Name Disk group

-- ----- ----------------- --------- ---------

1. ONLINE 1a8593de9c654f77bf7d55440dc20ce0 (ORCL:ASM_FRA_0001) [OCR1]

2. ONLINE 49e5d45ebe874f7fbfbc514fa51cc641 (ORCL:ASM_FRA_0002) [OCR1]

3. ONLINE 248240fba9784f57bf2021416760d415 (ORCL:ASM_FRA_0003) [OCR1]

Located 3 voting disk(s).

8.4 Verify using asmcmd if voting disk is 'Y' against the disk group

[oragrid@ocservera ~]$ asmcmd

ASMCMD> lsdg

State Type Rebal Sector Block AU Total_MB Free_MB Req_mir_free_MB Usable_file_MB Offline_disks Voting_files Name

MOUNTED NORMAL N 512 4096 1048576 3057 1468 531 468 0 N OCR/

MOUNTED NORMAL N 512 4096 1048576 558030 556342 563 277889 0 Y OCR1/

9. move the spfile to new diskgroup using spmove

9.1 create spfile directory in the new diskgroup

asmcmd> mkdir +OCR1/ocserver-cl/asmparameterfile

9.2 spmove will copy the current spfile to the new location and update the gpn profile for next startup. This command throw erros as not all alterations performed as current spfile is being used, in the next startup

the new spfile will be effective and we can manually remove the old spfile.

ASMCMD> spmove +OCR/ocserver-cl/asmparameterfile/registry.253.762275705 +OCR1/ocserver-cl/asmparameterfile/spfileASM.ora

ORA-15032: not all alterations performed

ORA-15028: ASM file '+DATA/asm/asmparameterfile/REGISTRY.253.715881237' not dropped; currently being accessed (DBD ERROR: OCIStmtExecute

Alternatively we can do this using the below steps Ref:How to move ASM spfile to a different disk group [ID 1082943.1

To move ASM spfile to another disk group, either make use of intermediate pfile:

Create intermediate pfile from the current spfile

Create spfile in a new disk group from the intermediate pfile

Restart the HA stack to verify that ASM starts up fine with moved spfile

Remove the original spfile

or use 'asmcmd spcopy' command

Copy spfile with -u option - to update GPnP profile in RAC environment

Restart the HA stack to verify that ASM starts up fine with copiedspfile

Remove the original spfile

9.3 . Restart the HA stack to verify that ASM starts up fine with moved spfile

crsctl stop cluster -all

crsctl start cluster -all

9.4. Verify spfile has been changed

[oragrid@ocservera ~]$ sqlplus /nolog

SQL*Plus: Release 11.2.0.2.0 Production on Mon Sep 26 15:12:42 2011

SQL> conn / as sysasm

Connected.

SQL> show parameter spfile

NAME TYPE VALUE

------------------------------------ ----------- ------------------------------

spfile string +OCR1/ocserver-cl/asmparamete

rfile/spfileasm.ora

SQL> exit

Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production

With the Real Application Clusters and Automatic Storage Management options

10. Dismount the ocr diskgroup from all the instances

SQL> alter diskgroup ocr mount;

Diskgroup altered.

if the disk group is used or mounted by any of the process/instance we may get the below error

ASMCMD> dropdg -r -f OCR

ORA-15039: diskgroup not dropped

ORA-15073: diskgroup OCR is mounted by another ASM instance (DBD ERROR: OCIStmtExecute)

11. Beside spfile,ocr,votingdisk if any of the files are created, please remove the files manualy using asmcmd rm command or drop/move the files from the respective database

12. Now we are ready to drop the diskgroup

dropdg -r -f OCR

13. Verify all are intact.

ASMCMD> lsdg

State Type Rebal Sector Block AU Total_MB Free_MB Req_mir_free_MB Usable_file_MB Offline_disks Voting_files Name

MOUNTED NORMAL N 512 4096 1048576 558030 556342 563 277889 0 Y OCR1/

4 comments:

Anonymous14 November 2012 at 01:56
Thanks for the steps. I had to do this in a hurry in my environment and couldn't go through the jazz of document.

Thanks.

Anonymous27 February 2013 at 20:53
Nice artical, Thanks for sharing.
Anonymous1 October 2013 at 01:37
Very nice document it is very useful and easy to understand.
Alvin Sormin30 October 2013 at 20:47
Thanks for sharing, but I have question, what if we want to migrate the disk but on the 1 diskgroup contains data, ocr, votedisk, and asm spfile.
we want to migrate all disk to another SAN. can we just add disk and drop old disk ?

Jeyaseelan Blog

Friday 14 October 2011

How to move the OCR diskgroup contents to another group online

How to move the OCR diskgroup contents to another group online in a RAC enviornment

4 comments:

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