=====Oracle 12c - ASM Disk Gruppen und ASM Disks in einer Gruppe umbenennen =====

==== Eine leere Disk Gruppe umbennen====

Bei einer leeren Gruppe ist das einfach, bei einer Gruppe mit Daten sorgfältig die Doku von Oracle (siehe link unten) prüfen!


Diskgruppe von allen Knoten weg mounten:

<code sql>
 alter diskgroup VOT dismount;
</code>


Umbenennen mit **renamedg** :

<code bash>
renamedg dgname=VOT newdgname=VOTNFS asm_diskstring='/dev/oracleasm/disks/*,/opt/oracle/VOTNFSDISK/vote_nfs_disk01' verbose=true


Parsing parameters..

Parameters in effect:

         Old DG name          : VOT
         New DG name          : VOTNFS
         Phases               :
                 Phase 1
                 Phase 2
         Discovery str        : /dev/oracleasm/disks/*,/opt/oracle/VOTNFSDISK/vote_nfs_disk01
         Clean                : TRUE
         Raw only             : TRUE
renamedg operation: dgname=VOT newdgname=VOTNFS asm_diskstring=/dev/oracleasm/disks/*,/opt/oracle/VOTNFSDISK/vote_nfs_disk01 verbose=true
Executing phase 1
Discovering the group
Performing discovery with string:/dev/oracleasm/disks/*,/opt/oracle/VOTNFSDISK/vote_nfs_disk01
Identified disk UFS:/dev/oracleasm/disks/VOT1_02 with disk number:3 and timestamp (33039887 -1916262400)
Identified disk UFS:/dev/oracleasm/disks/VOT1 with disk number:0 and timestamp (33039532 -1177383936)
Identified disk UFS:/opt/oracle/VOTNFSDISK/vote_nfs_disk01 with disk number:2 and timestamp (33039765 973622272)
Checking for hearbeat...
Re-discovering the group
Performing discovery with string:/dev/oracleasm/disks/*,/opt/oracle/VOTNFSDISK/vote_nfs_disk01
Identified disk UFS:/dev/oracleasm/disks/VOT1_02 with disk number:3 and timestamp (33039887 -1916262400)
Identified disk UFS:/dev/oracleasm/disks/VOT1 with disk number:0 and timestamp (33039532 -1177383936)
Identified disk UFS:/opt/oracle/VOTNFSDISK/vote_nfs_disk01 with disk number:2 and timestamp (33039765 973622272)
Checking if the diskgroup is mounted or used by CSS
Checking disk number:3
Checking disk number:0
Checking disk number:2
Generating configuration file..
Completed phase 1
Executing phase 2
Looking for /dev/oracleasm/disks/VOT1_02
Modifying the header
Looking for /dev/oracleasm/disks/VOT1
Modifying the header
Looking for /opt/oracle/VOTNFSDISK/vote_nfs_disk01
Modifying the header
Completed phase 2
Terminating kgfd context 0x7f21b22650a0

</code>


Gruppe wieder neu anmelden:
<code sql>
alter diskgroup VOTNFS mount;
</code>

siehe https://docs.oracle.com/database/121/OSTMG/GUID-45A0F079-2D23-47D3-A366-569076D2F845.htm#OSTMG94159

=== Im Cluster umbenennen ===

Nach dem Umbennen die Ressource auch im Cluster freigeben, damit der alte Name der Disk Group nicht als Offline angezeigt wird.

<code bash>
crs_stat -t

Name           Type           Target    State     Host
------------------------------------------------------------
...
ora.VOT.dg     ora....up.type OFFLINE   OFFLINE




srvctl status diskgroup -diskgroup VOT
Disk Group VOT is not running


srvctl remove diskgroup -diskgroup VOT


#Offline Resource verschwunden!
</code>


----


==== Disk Namen anpassen ====

Auf beiden Knoten dismounten:
<code sql>
alter diskgroup VOTNFS dismount;
</code>


Auf Knoten 1 im Restrict Modus mounten:
<code sql>
ALTER DISKGROUP VOTNFS MOUNT RESTRICTED;
</code>

Umbenennen:
<code sql>

#prüfen
select d.name
    ,  d.path
 from v$asm_disk d 
      inner join v$asm_diskgroup g on ( d.group_number=g.group_number)
where g.name = 'VOTNFS';  

Disk                 Disk
Name                 path
-------------------- ------------------------------
VOTAS1               /dev/oracleasm/disks/VOT1_02
VOT1S1               /dev/oracleasm/disks/VOT1
VOT_0002             /opt/oracle/VOTNFSDISK/vote_nfs_disk01


# umbenennen

ALTER DISKGROUP VOTNFS RENAME DISK 'VOTAS1' TO 'VOT1S1', 'VOT_0002' to 'VOT1NFS';


# prüfen

select d.name
    ,  d.path
 from v$asm_disk d 
      inner join v$asm_diskgroup g on ( d.group_number=g.group_number)
where g.name = 'VOTNFS';  

Disk                 Disk
Name                 path
-------------------- ------------------------------
VOT1S2               /dev/oracleasm/disks/VOT1_02
VOT1S1               /dev/oracleasm/disks/VOT1
VOT1NFS              /opt/oracle/VOTNFSDISK/vote_nfs_disk01

</code>


Wieder "richtig" mounten:
<code sql>
alter diskgroup VOTNFS dismount;
alter diskgroup VOTNFS mount;
</code> 

Auf allen Knoten!


=> https://docs.oracle.com/database/121/OSTMG/GUID-A2E82BE6-BE5E-42F8-8723-03DF5CD55D90.htm#OSTMG95706