Oracle RAC IntelliSnap Troubleshooting - IntelliSnap backup copy of an oracle ASM database fails if you perform a IntelliSnap operation without disabling the Snap Integrity for persistent snap engines

If you perform a IntelliSnap operation without disabling the Snap Integrity for persistent snap engines, the following error is displayed:

19935 b7f476d0 03/01 12:20:03 11972 ASMDiskGroup::mountASMDisk() - Failed while excuting sql [alter system set asm_diskstring='/ora_snap*/asm*','/ora_snap*/*'
 /alter diskgroup DATA mount
 /
 ] output = [ SQL*Plus: Release 11.2.0.1.0 Production on Thu Mar 1 12:20:03 2012,Copyright (c) 1982, 2009, Oracle. All rights reserved.,SQL> SQL> SQL> SQL> Connected.,SQL> SQL> SQL> SQL> SQL> SQL> SQL>,System altered.,alter diskgroup DATA mount,ERROR at line 1:,ORA-15032: not all alterations performed,ORA-15017: diskgroup "DATA" cannot be mounted,ORA-15063: ASM discovered an insufficient number of disks for diskgroup "DATA",SQL> SQL> Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production,With the Automatic Storage Management option,]
 19935 b7f476d0 03/01 12:20:03 11972 ASMDiskGroup::mountASMDisk() - One of the diskgroups could not be mounted
 19935 b7f476d0 03/01 12:20:03 11972 ClOraSnapAgent::RenameAndMountASMDiskGroup() - mountASMDiskGroup failed

Perform the following steps to resolve this issue:

Mount the snaps from the CommCell console (List Snapshots-->Mount) on Proxy and then use the following command:

/opt/commvault/Base/diskgroup_rename.pl -y <original source diskgroup name> <mounted disk path>

For example, if snap is mounted on /tmp and the original diskgroup name is DATA01, then perform the following command:

[oracle@Hindu ~]$ /opt/commvault/Base/diskgroup_rename.pl -y DATA01 /tmp/volume_1335990104/DATA01
 renaming disks to: DATA01
 current name for /tmp/volume_1335990104/DATA01: DS2995770
 new name for /tmp/volume_1335990104/DATA01: DATA01

Unmount the Snap. Perform the same for all the snaps in that IntelliSnap operation.