====== Migrer les données d'un diskgroup ======
== 1/ Diskgroup redondance normale ==
Il s'agit du diskgroup **DATA** avec redondance //normal// sur 3 disques (perte 1 disque toléré)
* 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
* Afficher l'espace disque des DISKGROUP:
SQL>
set lines 1000
column "Diskgroup" format A30
column "Imbalance" format 99.9 Heading "Percent|Imbalance"
column "Variance" format 99.9 Heading "Percent|Disk Size|Variance"
column "MinFree" format 99.9 Heading "Minimum|Percent|Free"
column "DiskCnt" format 9999 Heading "Disk|Count"
column "Type" format A10 Heading "Diskgroup|Redundancy"
SELECT g.name "Diskgroup",
100*(max((d.total_mb-d.free_mb)/d.total_mb)-min((d.total_mb-d.free_mb)/d.total_mb))/max((d.total_mb-d.free_mb)/d.total_mb) "Imbalance",
100*(max(d.total_mb)-min(d.total_mb))/max(d.total_mb) "Variance",
100*(min(d.free_mb/d.total_mb)) "MinFree",
count(*) "DiskCnt",
g.type "Type"
FROM v$asm_disk d, v$asm_diskgroup g
WHERE d.group_number = g.group_number and
d.group_number <> 0 and
d.state = 'NORMAL' and
d.mount_status = 'CACHED'
GROUP BY g.name, g.type;
Percent Minimum
Percent Disk Size Percent Disk Diskgroup
Diskgroup Imbalance Variance Free Count Redundancy
------------------------------ --------- --------- ------- ----- ----------
FRA .0 .0 89.6 1 EXTERN
OCR 2.4 .0 96.8 3 NORMAL
DATA .0 .0 60.6 3 NORMAL
* Les opérations ORACLEASM se font en **ROOT**
* Les autres opérations se font en **GRID**
__**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_DATA4 /dev/sdh1
[root@oracle2 bin]# oracleasm createdisk ASM_DATA5 /dev/sdi1
[root@oracle2 bin]# oracleasm createdisk ASM_DATA6 /dev/sdj1
* 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_DATA4"
Instantiating disk "ASM_DATA5"
Instantiating disk "ASM_DATA6"
[root@oracle3 ~]#
[root@oracle3 ~]#
[root@oracle3 ~]# oracleasm listdisks
ASM_DATA1
ASM_DATA2
ASM_DATA3
ASM_DATA4
ASM_DATA5
ASM_DATA6
ASM_FRA1
ASM_FRA2
ASM_OCR1
ASM_OCR2
ASM_OCR3
* Une fois nos disques initialisés, ils sont disponibles dans ASM
SQL>
set lines 800
col disk_file_path format A40
SELECT a.name disk_group_name
, b.path disk_file_path
, b.name disk_file_name
, b.failgroup disk_file_fail_group
FROM v$asm_diskgroup a RIGHT OUTER JOIN v$asm_disk b USING (group_number)
ORDER BY a.name;
DISK_GROUP_NAME DISK_FILE_PATH DISK_FILE_NAME DISK_FILE_FAIL_GROUP
------------------------------ ------------------------------ ------------------------------ ------------------------------ ---------------------------------------
DATA /dev/oracleasm/disks/ASM_DATA3 DATA_0002 DATA_0002
DATA /dev/oracleasm/disks/ASM_DATA1 DATA_0000 DATA_0000
DATA /dev/oracleasm/disks/ASM_DATA2 DATA_0001 DATA_0001
FRA /dev/oracleasm/disks/ASM_FRA1 FRA_0000 FRA_0000
OCR /dev/oracleasm/disks/ASM_OCR3 OCR_0000 OCR_0000
OCR /dev/oracleasm/disks/ASM_OCR1 OCR_0002 OCR_0002
OCR /dev/oracleasm/disks/ASM_OCR2 OCR_0001 OCR_0001
/dev/oracleasm/disks/ASM_DATA6
/dev/oracleasm/disks/ASM_DATA5
/dev/oracleasm/disks/ASM_DATA4
* Nous les ajoutons au Diskgroup **DATA** et lançons un //rebalance// des données.
* à noter que plus l'option **//POWER X//** est grande, plus il y aura de consommation CPU, IO disque et plus vite la reconstruction des bandes de parité et le transfert des données sera rapide (//integer// de 0 à 1024, où 0=annulation)
SQL> alter diskgroup DATA add disk '/dev/oracleasm/disks/ASM_DATA4','/dev/oracleasm/disks/ASM_DATA5','/dev/oracleasm/disks/ASM_DATA6' rebalance power 9;
Diskgroup altered.
* suivi de l'opération
SQL> select * from v$asm_operation;
GROUP_NUMBER OPERA PASS STAT POWER ACTUAL SOFAR EST_WORK EST_RATE EST_MINUTES ERROR_CODE CON_ID
------------ ----- --------- ---- ---------- ---------- ---------- ---------- ---------- ----------- -------------------------------------------- ----------
1 REBAL COMPACT WAIT 9 9 0 0 0 0 0
1 REBAL REBALANCE RUN 9 9 1365 14408 12849 1 0
1 REBAL REBUILD DONE 9 9 187 187 0 0 0
1 REBAL RESYNC DONE 9 9 0 0 0 0 0
* le rebalance se matérialise par 2 daemon **ARB** :
SQL> !ps -ef | grep asm | grep arb
grid 1533 1 0 20:20 ? 00:00:00 asm_arba_+ASM1
grid 1535 1 5 20:20 ? 00:00:18 asm_arb0_+ASM1
grid 5010 29595 0 20:25 pts/0 00:00:00 /bin/bash -c ps -ef | grep asm | grep arb
* on peut augmenter l'agressivité du rebalance en cours de route:
alter diskgroup DATA rebalance power 50;
* le transfert sur les nouveaux disques est terminé quand il n'y a plus d'opération de //rebalance// en cours
SQL> select * from v$asm_operation;
no rows selected
* on peut le valider dans l'alert_log
[grid@oracle2 trace]$ tail -f alert_+ASM1.log
NOTE: requesting all-instance membership refresh for group=1
2025-10-20T20:42:57.221299+02:00
NOTE: membership refresh pending for group 1/0x8fc03614 (DATA)
2025-10-20T20:42:57.350064+02:00
GMON querying group 1 at 34 for pid 26, osid 9072
2025-10-20T20:42:57.353560+02:00
SUCCESS: refreshed membership for 1/0x8fc03614 (DATA)
2025-10-20T20:42:59.490306+02:00
NOTE: Attempting voting file refresh on diskgroup DATA
NOTE: Refresh completed on diskgroup DATA. No voting file found.
2025-10-20T21:12:45.235923+02:00
NOTE: stopping process ARB0
NOTE: stopping process ARBA
2025-10-20T21:12:45.627196+02:00
SUCCESS: rebalance completed for group 1/0x8fc03614 (DATA)
== Suppression des disques ==
set lines 800
column disk_group_name format a30
column path format a50
column disk_file_name format a50
SELECT NVL(a.name, '[CANDIDATE]') disk_group_name, b.path, b.name disk_file_name
FROM v$asm_diskgroup a RIGHT OUTER JOIN v$asm_disk b USING (group_number)
ORDER BY a.name;SQL> SQL> SQL> SQL> 2 3
DISK_GROUP_NAME PATH DISK_FILE_NAME
------------------------------ -------------------------------------------------- --------------------------------------------------
DATA /dev/oracleasm/disks/ASM_DATA6 DATA_0005
DATA /dev/oracleasm/disks/ASM_DATA1 DATA_0000
DATA /dev/oracleasm/disks/ASM_DATA5 DATA_0004
DATA /dev/oracleasm/disks/ASM_DATA4 DATA_0003
DATA /dev/oracleasm/disks/ASM_DATA3 DATA_0002
FRA /dev/oracleasm/disks/ASM_FRA1 FRA_0000
OCR /dev/oracleasm/disks/ASM_OCR2 OCR_0001
OCR /dev/oracleasm/disks/ASM_OCR3 OCR_0000
OCR /dev/oracleasm/disks/ASM_OCR1 OCR_0002
[CANDIDATE] /dev/oracleasm/disks/ASM_DATA2
10 rows selected.
alter diskgroup DATA drop disk DATA_0002,DATA_0001,DATA_0000 rebalance power 50;
SQL> set lines 1000
col PATH format A50
col FAILGROUP_TYPE format A20
select PATH,MOUNT_STATUS,MODE_STATUS,STATE,REDUNDANCY,TOTAL_MB/1024 "TOTAL GB",FREE_MB/1024 "FREE GB",FAILGROUP_TYPE from v$asm_disk;SQL> SQL> SQL>
PATH MOUNT_S MODE_ST STATE REDUNDA TOTAL GB FREE GB FAILGROUP_TYPE
-------------------------------------------------- ------- ------- -------- ------- ---------- ---------- --------------------
/dev/oracleasm/disks/ASM_DATA2 CLOSED ONLINE NORMAL UNKNOWN 0 0 REGULAR
/dev/oracleasm/disks/ASM_OCR3 CACHED ONLINE NORMAL UNKNOWN 9.99609375 9.67578125 REGULAR
/dev/oracleasm/disks/ASM_FRA1 CACHED ONLINE NORMAL UNKNOWN 39.9990234 35.8339844 REGULAR
/dev/oracleasm/disks/ASM_OCR2 CACHED ONLINE NORMAL UNKNOWN 9.99609375 9.6875 REGULAR
/dev/oracleasm/disks/ASM_OCR1 CACHED ONLINE NORMAL UNKNOWN 9.99609375 9.68359375 REGULAR
/dev/oracleasm/disks/ASM_DATA3 CACHED ONLINE DROPPING UNKNOWN 19.9990234 16.5458984 REGULAR <====
/dev/oracleasm/disks/ASM_DATA1 CACHED ONLINE DROPPING UNKNOWN 19.9990234 16.5449219 REGULAR <====
/dev/oracleasm/disks/ASM_DATA6 CACHED ONLINE NORMAL UNKNOWN 19.9990234 14.4287109 REGULAR
/dev/oracleasm/disks/ASM_DATA5 CACHED ONLINE NORMAL UNKNOWN 19.9990234 14.4257813 REGULAR
/dev/oracleasm/disks/ASM_DATA4 CACHED ONLINE NORMAL UNKNOWN 19.9990234 14.4267578 REGULAR
10 rows selected.
* suivi de l'opération
SQL> select * from v$asm_operation;
no rows selected
* une fois terminé, les disques enlevés sont en **MOUNT_STATE=CLOSED**
SQL> set lines 1000
col PATH format A50
col FAILGROUP_TYPE format A20
select PATH,MOUNT_STATUS,MODE_STATUS,STATE,REDUNDANCY,TOTAL_MB/1024 "TOTAL GB",FREE_MB/1024 "FREE GB",FAILGROUP_TYPE from v$asm_disk;
PATH MOUNT_S MODE_ST STATE REDUNDA TOTAL GB FREE GB FAILGROUP_TYPE
-------------------------------------------------- ------- ------- -------- ------- ---------- ---------- --------------------
/dev/oracleasm/disks/ASM_DATA2 CLOSED ONLINE NORMAL UNKNOWN 0 0 REGULAR <====
/dev/oracleasm/disks/ASM_DATA1 CLOSED ONLINE NORMAL UNKNOWN 0 0 REGULAR <====
/dev/oracleasm/disks/ASM_DATA3 CLOSED ONLINE NORMAL UNKNOWN 0 0 REGULAR <====
/dev/oracleasm/disks/ASM_OCR3 CACHED ONLINE NORMAL UNKNOWN 9.99609375 9.67578125 REGULAR
/dev/oracleasm/disks/ASM_FRA1 CACHED ONLINE NORMAL UNKNOWN 39.9990234 35.8339844 REGULAR
/dev/oracleasm/disks/ASM_OCR2 CACHED ONLINE NORMAL UNKNOWN 9.99609375 9.6875 REGULAR
/dev/oracleasm/disks/ASM_OCR1 CACHED ONLINE NORMAL UNKNOWN 9.99609375 9.68359375 REGULAR
/dev/oracleasm/disks/ASM_DATA6 CACHED ONLINE NORMAL UNKNOWN 19.9990234 12.1269531 REGULAR
/dev/oracleasm/disks/ASM_DATA5 CACHED ONLINE NORMAL UNKNOWN 19.9990234 12.1269531 REGULAR
/dev/oracleasm/disks/ASM_DATA4 CACHED ONLINE NORMAL UNKNOWN 19.9990234 12.1259766 REGULAR
10 rows selected.
* ces opérations sont visibles dans l'alert_log
[grid@oracle2 trace]$ tail -f alert_+ASM1.log
2025-10-20T21:20:31.582323+02:00
NOTE: updating disk modes to 0x15 from 0x7f for disk 0 (DATA_0000) in group 1 (DATA): lflags 0x4
NOTE: updating disk modes to 0x15 from 0x7f for disk 2 (DATA_0002) in group 1 (DATA): lflags 0x4
NOTE: updating disk modes to 0x1 from 0x15 for disk 0 (DATA_0000) in group 1 (DATA): lflags 0x4
NOTE: updating disk modes to 0x1 from 0x15 for disk 2 (DATA_0002) in group 1 (DATA): lflags 0x4
2025-10-20T21:20:31.605517+02:00
NOTE: cache closing disk 0 of grp 1: DATA_0000
2025-10-20T21:20:31.606205+02:00
NOTE: cache closing disk 2 of grp 1: DATA_0002
2025-10-20T21:20:31.851832+02:00
NOTE: membership refresh pending for group 1/0x8fc03614 (DATA)
2025-10-20T21:20:31.858691+02:00
GMON querying group 1 at 36 for pid 26, osid 9072
GMON querying group 1 at 37 for pid 26, osid 9072
2025-10-20T21:20:31.893635+02:00
NOTE: Disk DATA_0000 in mode 0x0 marked for de-assignment
NOTE: Disk DATA_0002 in mode 0x0 marked for de-assignment
SUCCESS: refreshed membership for 1/0x8fc03614 (DATA)
2025-10-20T21:20:34.511104+02:00
NOTE: Attempting voting file refresh on diskgroup DATA
NOTE: Refresh completed on diskgroup DATA. No voting file found.
* Il ne reste plus qu'à les supprimer d'ASM, pour les rendre à l'OS
[root@oracle3 ~]# oracleasm deletedisk ASM_DATA1
Disk "ASM_DATA1" defines an unmarked device
Dropping disk: done
[root@oracle3 ~]# oracleasm deletedisk ASM_DATA2
Clearing disk header: done
Dropping disk: done
[root@oracle3 ~]# oracleasm deletedisk ASM_DATA3
Clearing disk header: done
Dropping disk: done
[root@oracle3 ~]# oracleasm listdisks
ASM_DATA4
ASM_DATA5
ASM_DATA6
ASM_FRA1
ASM_OCR1
ASM_OCR2
ASM_OCR3
== 2/ Diskgroup redondance external ==
Il s'agit du diskgroup **FRA** avec redondance //external// sur 1 disque (perte 0 disque toléré)
* 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
* Afficher l'espace disque des DISKGROUP:
SQL>
set lines 1000
column "Diskgroup" format A30
column "Imbalance" format 99.9 Heading "Percent|Imbalance"
column "Variance" format 99.9 Heading "Percent|Disk Size|Variance"
column "MinFree" format 99.9 Heading "Minimum|Percent|Free"
column "DiskCnt" format 9999 Heading "Disk|Count"
column "Type" format A10 Heading "Diskgroup|Redundancy"
SELECT g.name "Diskgroup",
100*(max((d.total_mb-d.free_mb)/d.total_mb)-min((d.total_mb-d.free_mb)/d.total_mb))/max((d.total_mb-d.free_mb)/d.total_mb) "Imbalance",
100*(max(d.total_mb)-min(d.total_mb))/max(d.total_mb) "Variance",
100*(min(d.free_mb/d.total_mb)) "MinFree",
count(*) "DiskCnt",
g.type "Type"
FROM v$asm_disk d, v$asm_diskgroup g
WHERE d.group_number = g.group_number and
d.group_number <> 0 and
d.state = 'NORMAL' and
d.mount_status = 'CACHED'
GROUP BY g.name, g.type;
Percent Minimum
Percent Disk Size Percent Disk Diskgroup
Diskgroup Imbalance Variance Free Count Redundancy
------------------------------ --------- --------- ------- ----- ----------
FRA .0 .0 89.6 1 EXTERN
OCR 2.4 .0 96.8 3 NORMAL
DATA .0 .0 60.6 3 NORMAL
* initialisation ASM:
[root@oracle2 bin]# oracleasm createdisk ASM_FRA2 /dev/sdk1
Writing disk header: done
Instantiating disk: done
[root@oracle2 bin]# oracleasm listdisks
ASM_DATA1
ASM_DATA2
ASM_DATA3
ASM_DATA4
ASM_DATA5
ASM_DATA6
ASM_FRA1
ASM_FRA2
ASM_OCR1
ASM_OCR2
ASM_OCR3
* 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_FRA2"
[root@oracle3 ~]#
[root@oracle3 ~]#
[root@oracle3 ~]# oracleasm listdisks
ASM_DATA4
ASM_DATA5
ASM_DATA6
ASM_FRA1
ASM_FRA2
ASM_OCR1
ASM_OCR2
ASM_OCR3
* vérification de la disponibilité dans ASM
SQL>
set lines 800
col disk_file_path format A40
SELECT a.name disk_group_name
, b.path disk_file_path
, b.name disk_file_name
, b.failgroup disk_file_fail_group
FROM v$asm_diskgroup a RIGHT OUTER JOIN v$asm_disk b USING (group_number)
ORDER BY a.name;
DISK_GROUP_NAME DISK_FILE_PATH DISK_FILE_NAME DISK_FILE_FAIL_GROUP
------------------------------ ---------------------------------------- ------------------------------ ------------------------------
DATA /dev/oracleasm/disks/ASM_DATA6 DATA_0005 DATA_0005
DATA /dev/oracleasm/disks/ASM_DATA5 DATA_0004 DATA_0004
DATA /dev/oracleasm/disks/ASM_DATA4 DATA_0003 DATA_0003
FRA /dev/oracleasm/disks/ASM_FRA1 FRA_0000 FRA_0000
OCR /dev/oracleasm/disks/ASM_OCR1 OCR_0002 OCR_0002
OCR /dev/oracleasm/disks/ASM_OCR3 OCR_0000 OCR_0000
OCR /dev/oracleasm/disks/ASM_OCR2 OCR_0001 OCR_0001
/dev/oracleasm/disks/ASM_FRA2
* ajout au Diskgroup **FRA** et //rebalance// des données.
SQL> alter diskgroup FRA add disk '/dev/oracleasm/disks/ASM_FRA2' rebalance power 20;
Diskgroup altered.
* suivi de l'opération
SQL> select * from v$asm_operation;
GROUP_NUMBER OPERA PASS STAT POWER ACTUAL SOFAR EST_WORK EST_RATE EST_MINUTES ERROR_CODE CON_ID
------------ ----- --------- ---- ---------- ---------- ---------- ---------- ---------- ----------- -------------------------------------------- ----------
2 REBAL COMPACT RUN 20 20 28 0 0 0 0
2 REBAL REBALANCE DONE 20 20 2129 2129 0 0 0
2 REBAL REBUILD DONE 20 20 0 0 0 0 0
* suppression du disque du DISKGROUP
ALTER diskgroup FRA DROP disk FRA_0000 rebalance POWER 50;
Diskgroup altered.
suivi de la suppression
SQL> select * from v$asm_operation;
GROUP_NUMBER OPERA PASS STAT POWER ACTUAL SOFAR EST_WORK EST_RATE EST_MINUTES ERROR_CODE CON_ID
------------ ----- --------- ---- ---------- ---------- ---------- ---------- ---------- ----------- -------------------------------------------- ----------
2 REBAL COMPACT WAIT 50 50 0 0 0 0 0
2 REBAL REBALANCE RUN 50 50 1201 2133 83095 0 0
2 REBAL REBUILD DONE 50 50 0 0 0 0
* une fois terminé, le disque a supprimer n'est plus membre d'un diskgroup
SQL> set lines 800
col disk_file_path format A40
SELECT a.name disk_group_name
, b.path disk_file_path
, b.name disk_file_name
, b.failgroup disk_file_fail_group
FROM v$asm_diskgroup a RIGHT OUTER JOIN v$asm_disk b USING (groSQL> SQL> 2 3 up_number)
ORDER BY a.name; 4 5 6
DISK_GROUP_NAME DISK_FILE_PATH DISK_FILE_NAME DISK_FILE_FAIL_GROUP
------------------------------ ---------------------------------------- ------------------------------ ------------------------------
DATA /dev/oracleasm/disks/ASM_DATA5 DATA_0004 DATA_0004
DATA /dev/oracleasm/disks/ASM_DATA6 DATA_0005 DATA_0005
DATA /dev/oracleasm/disks/ASM_DATA4 DATA_0003 DATA_0003
FRA /dev/oracleasm/disks/ASM_FRA2 FRA_0001 FRA_0001
OCR /dev/oracleasm/disks/ASM_OCR1 OCR_0002 OCR_0002
OCR /dev/oracleasm/disks/ASM_OCR3 OCR_0000 OCR_0000
OCR /dev/oracleasm/disks/ASM_OCR2 OCR_0001 OCR_0001
/dev/oracleasm/disks/ASM_FRA1
8 rows selected.
* une fois terminé, suppression du disque d'ASM
[root@oracle2 bin]# oracleasm deletedisk ASM_FRA1
Clearing disk header: done
Dropping disk: done
[root@oracle2 bin]# oracleasm listdisks
ASM_DATA4
ASM_DATA5
ASM_DATA6
ASM_FRA2
ASM_OCR1
ASM_OCR2
ASM_OCR3
* on rafraichi sur l'autre noeud du RAC
[root@oracle3 ~]# oracleasm scandisks
Reloading disk partitions: done
Cleaning any stale ASM disks...
Cleaning disk "ASM_FRA1"
Scanning system for ASM disks...
[root@oracle3 ~]# oracleasm listdisks
ASM_DATA4
ASM_DATA5
ASM_DATA6
ASM_FRA2
ASM_OCR1
ASM_OCR2
ASM_OCR3