ORA-15055: unable to connect to ASM instance



ORA-15055: unable to connect to ASM instance..

Answer / guest

Cause: When accessing a diskgroup for the first time, the
database was unable to connect to the required ASM instance.

Action: Check the additional error messages. May need to
configure correct ASM sid or make sure the database instance
has OS privileges for ASM SYSDBA.

Please add more information about this Error

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