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asm erro r:-ORA-15260: permission denied on ASM disk group

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ORA-15260: permission denied on ASM disk group

SQL> alter diskgroup DG1 rebalance power 11;
alter diskgroup DG1 rebalance power 11
*
ERROR at line 1:
ORA-15032: not all alterations performed
ORA-15260: permission denied on ASM disk group


Solution:
SQL> exit
Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - Production
With the Automatic Storage Management option

[grid@raj bin]$ sqlplus / as sysasm
SQL*Plus: Release 11.2.0.3.0 Production on Sat Jan 16 14:41:21 2016
Copyright (c) 1982, 2011, Oracle.  All rights reserved.

Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - Production
With the Automatic Storage Management option

SQL> alter system set asm_power_limit=11 scope=spfile;
System altered.


SQL> alter diskgroup DG1 rebalance power 11;
Diskgroup altered.

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