Migrer Diskgroup OCR

Il s'agit du diskgroup OCR avec redondance normal sur 3 disques (perte 1 disque toléré).

Ce diskgroup est particulier, car il contient les OCR,OLR et les voting disks.

* Afficher l'articulation des DISKGROUP:

SQL>
SET lines 800
column disk_group_name format a30
column PATH format a50
column disk_file_name format a30
column FAILGROUP_TYPE format a20
SELECT NVL(a.name, '[CANDIDATE]') disk_group_name, b.PATH, b.name disk_file_name, a.TYPE
FROM v$asm_diskgroup a RIGHT OUTER JOIN v$asm_disk b USING (group_number)
ORDER BY a.name;
 
 
DISK_GROUP_NAME 	       PATH						  DISK_FILE_NAME		 TYPE
------------------------------ -------------------------------------------------- ------------------------------ ------
DATA			       /dev/oracleasm/disks/ASM_DATA1			  DATA_0000			 NORMAL
DATA			       /dev/oracleasm/disks/ASM_DATA2			  DATA_0001			 NORMAL
DATA			       /dev/oracleasm/disks/ASM_DATA3			  DATA_0002			 NORMAL
FRA			       /dev/oracleasm/disks/ASM_FRA1			  FRA_0000			 EXTERN
OCR			       /dev/oracleasm/disks/ASM_OCR2			  OCR_0001			 NORMAL
OCR			       /dev/oracleasm/disks/ASM_OCR1			  OCR_0002			 NORMAL
OCR			       /dev/oracleasm/disks/ASM_OCR3			  OCR_0000			 NORMAL

Ajout disques

• ajouter 3 nouveaux disques au niveau OS et y créer une partition primaire

• nous devons ensuite les initialiser par ASM:

[root@oracle2 bin]# oracleasm createdisk ASM_OCR4 /dev/sdl1
[root@oracle2 bin]# oracleasm createdisk ASM_OCR5 /dev/sdm1
[root@oracle2 bin]# oracleasm createdisk ASM_OCR6 /dev/sdn1

• on rafraichi les disques ASM sur l'autre noeud RAC

[root@oracle3 ~]# oracleasm scandisks
Reloading disk partitions: done
Cleaning any stale ASM disks...
Scanning system for ASM disks...
Instantiating disk "ASM_OCR6"
Instantiating disk "ASM_OCR5"
Instantiating disk "ASM_OCR4"
 
[root@oracle3 ~]# oracleasm listdisks
ASM_DATA4
ASM_DATA5
ASM_DATA6
ASM_FRA2
ASM_OCR1
ASM_OCR2
ASM_OCR3
ASM_OCR4
ASM_OCR5
ASM_OCR6