How To Rename A Diskgroup On ASM 11gR2

The present document provides a clear example about how to rename an ASM diskgroup on release 11gR2.

Solution

1) First of all, the desired diskgroup needs to be dismounted (from each node if this is a RAC configuration):

# asmcmd umount DATA

2) Verify that the desired diskgroup was dismounted:

# 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 32756 31828 244 15792 0 N DATA_OCR/

MOUNTED EXTERN N 512 4096 1048576 16378 10134 0 10134 0 N LOBDATA/

3) Then execute the rename statement:

# renamedg phase=both dgname=DATA newdgname=DG_PROD_DATA verbose=true

Parsing parameters..

Parameters in effect:

Old DG name : DATA

New DG name : DG_PROD_DATA

Phases :

Phase 1

Phase 2

Discovery str : (null)

Clean : TRUE

Raw only : TRUE

renamedg operation: phase=both dgname=DATA newdgname=DG_PROD_DATA verbose=true

Executing phase 1

Discovering the group

Performing discovery with string:

Identified disk ASM:/opt/oracle/extapi/64/asm/orcl/1/libasm.so:ORCL:DATA1 with disk number:0 and timestamp (32925601 -972709888)

Identified disk ASM:/opt/oracle/extapi/64/asm/orcl/1/libasm.so:ORCL:DATA2 with disk number:1 and timestamp (32925601 -972709888)

Identified disk ASM:/opt/oracle/extapi/64/asm/orcl/1/libasm.so:ORCL:DATA3 with disk number:2 and timestamp (32925601 -972709888)

Checking for hearbeat...

Re-discovering the group

Performing discovery with string:

Identified disk ASM:/opt/oracle/extapi/64/asm/orcl/1/libasm.so:ORCL:DATA1 with disk number:0 and timestamp (32925601 -972709888)

Identified disk ASM:/opt/oracle/extapi/64/asm/orcl/1/libasm.so:ORCL:DATA2 with disk number:1 and timestamp (32925601 -972709888)

Identified disk ASM:/opt/oracle/extapi/64/asm/orcl/1/libasm.so:ORCL:DATA3 with disk number:2 and timestamp (32925601 -972709888)

Checking if the diskgroup is mounted

Checking disk number:0

Checking disk number:1

Checking disk number:2

Checking if diskgroup is used by CSS

Generating configuration file..

Completed phase 1

Executing phase 2

Looking for ORCL:DATA1

Modifying the header

Looking for ORCL:DATA2

Modifying the header

Looking for ORCL:DATA3

Modifying the header

Completed phase 2

Terminating kgfd context 0x2af21517e0a0

4) Finally, mount the renamed diskgroup and validate that it was mounted (on each node if this is a RAC configuration):

# asmcmd mount DG_PROD_DATA

# 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 32756 31828 244 15792 0 N DATA_OCR/

MOUNTED EXTERN N 512 4096 1048576 24567 14267 0 14267 0 N DG_PROD_DATA/
MOUNTED EXTERN N 512 4096 1048576 16378 10134 0 10134 0 N LOBDATA/

---

<<< Note: renamedg tool cannot rename the associated ASM disk(s) name(s). >>>

From Oracle

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