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How to Rename a Diskgroup in ASM


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How to Use renamedg Utility to Rename ASM DiskGroup

In this post I will change the name of diskgroup from DG_TEST to DG01
Step 1: dismount the DG on all nodes 
Step 2: Validate rename DG operation by running  remamedg  command with check  options  verbose=true check=true
Step 3: Rename DG using renamedg utility
Step 4: mount the new DG 
Check out the current DG Configuration
$ asmcmd lsdg DG_TEST
State    Type    Rebal  Sector  Logical_Sector  Block       AU  Total_MB  Free_MB  Req_mir_free_MB  Usable_file_MB  Offline_disks  Voting_files  Name
MOUNTED  EXTERN  N         512             512   4096  1048576    102400   102346                0          102346              0             N  DG_TEST/
$ asmcmd lsdsk -k
Total_MB  Free_MB  OS_MB  Name     Failgroup  Site_Name  Site_GUID                         Site_Status  Failgroup_Type  Library                                      Label    Failgroup_Label  Site_Label  UDID  Product  Redund   Path
   51200    51174  51200  DISK011  DISK011               00000000000000000000000000000000               REGULAR         AFD Library - Generic , version 3 (KABI_V3)  DISK011                                              UNKNOWN  AFD:DISK011
   51200    51172  51200  DISK10   DISK10                00000000000000000000000000000000               REGULAR         AFD Library - Generic , version 3 (KABI_V3)  DISK10                                               UNKNOWN  AFD:DISK10
Dismount the Diskgroup from All Nodes
SQL> alter diskgroup DG_TEST dismount;
Diskgroup altered.
Validate the Diskgroup Rename without Actually Executing it
$ renamedg dgname=DG_TEST newdgname=DG01 verbose=true check=true
Parsing parameters..
Parameters in effect:
         Old DG name       : DG_TEST
         New DG name          : DG01
         Phases               :
                 Phase 1
                 Phase 2
         Discovery str        : (null)
         Check              : TRUE
         Clean              : TRUE
         Raw only           : TRUE
renamedg operation: dgname=DG_TEST newdgname=DG01 verbose=true check=true
Executing phase 1
Discovering the group
Performing discovery with string:
Identified disk ASM:AFD Library - Generic , version 3 (KABI_V3):AFD:DISK10 with disk number:0 and timestamp (33072750 1124915200)
Identified disk ASM:AFD Library - Generic , version 3 (KABI_V3):AFD:DISK011 with disk number:1 and timestamp (33072750 1124915200)
Checking for hearbeat...
Re-discovering the group
Performing discovery with string:
Identified disk ASM:AFD Library - Generic , version 3 (KABI_V3):AFD:DISK10 with disk number:0 and timestamp (33072750 1124915200)
Identified disk ASM:AFD Library - Generic , version 3 (KABI_V3):AFD:DISK011 with disk number:1 and timestamp (33072750 1124915200)
Checking if the diskgroup is mounted or used by CSS
Checking disk number:0
Checking disk number:1
Generating configuration file..
Completed phase 1
Executing phase 2
Looking for AFD:DISK10
Leaving the header unchanged
Looking for AFD:DISK011
Leaving the header unchanged
Completed phase 2
Rename the DiskGroup
$ renamedg dgname=DG_TEST newdgname=DG01 verbose=true
Parsing parameters..
Parameters in effect:
         Old DG name       : DG_TEST
         New DG name          : DG01
         Phases               :
                 Phase 1
                 Phase 2
         Discovery str        : (null)
         Clean              : TRUE
         Raw only           : TRUE
renamedg operation: dgname=DG_TEST newdgname=DG01 verbose=true
Executing phase 1
Discovering the group
Performing discovery with string:
Identified disk ASM:AFD Library - Generic , version 3 (KABI_V3):AFD:DISK10 with disk number:0 and timestamp (33072750 1124915200)
Identified disk ASM:AFD Library - Generic , version 3 (KABI_V3):AFD:DISK011 with disk number:1 and timestamp (33072750 1124915200)
Checking for hearbeat...
Re-discovering the group
Performing discovery with string:
Identified disk ASM:AFD Library - Generic , version 3 (KABI_V3):AFD:DISK10 with disk number:0 and timestamp (33072750 1124915200)
Identified disk ASM:AFD Library - Generic , version 3 (KABI_V3):AFD:DISK011 with disk number:1 and timestamp (33072750 1124915200)
Checking if the diskgroup is mounted or used by CSS
Checking disk number:0
Checking disk number:1
Generating configuration file..
Completed phase 1
Executing phase 2
Looking for AFD:DISK10
Modifying the header
Looking for AFD:DISK011
Modifying the header
Completed phase 2
Mount the Renamed DiskGroup
SQL> alter diskgroup DG01 mount;
Diskgroup altered.
$ asmcmd lsdg DG01 -g
Inst_ID  State    Type    Rebal  Sector  Logical_Sector  Block       AU  Total_MB  Free_MB  Req_mir_free_MB  Usable_file_MB  Offline_disks  Voting_files  Name
      1  MOUNTED  EXTERN  N         512             512   4096  1048576    102400   102346                0          102346              0             N  DG01/
Lastly Remove the NonExisting DG from CRS
$ srvctl remove diskgroup -g DG_TEST

==========================================================================
Following are acceptable argument for renamedg utility.

$ renamedg -help
Parsing parameters..
phase                           Phase to execute,
                                (phase=ONE|TWO|BOTH), default BOTH
dgname                          Diskgroup to be renamed
newdgname                       New name for the diskgroup
config                          intermediate config file
check                           just check-do not perform actual operation,
                                (check=TRUE/FALSE), default FALSE
confirm                         confirm before committing changes to disks,
                                (confirm=TRUE/FALSE), default FALSE
clean                           ignore errors,
                                (clean=TRUE/FALSE), default TRUE
asm_diskstring                  ASM Diskstring (asm_diskstring='discoverystring',
                                'discoverystring1' ...)
verbose                         verbose execution,
                                (verbose=TRUE|FALSE), default FALSE
keep_voting_files               Voting file attribute,
                                (keep_voting_files=TRUE|FALSE), default FALSE

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