| ERROR | disk string contains a valid RDBMS file |
| CAUSE | A disk specified in a CREATE DISKGROUP or ALTER DISKGROUP ... ADD DISK command appeared to contain a file from an existing database. By default, ASM will not allow a diskgroup to be created using this disk, as a safeguard against damaging an existing database. |
| ACTION | Check that the ASM disk specification is correct. Otherwise, when storage from a defunct database is reused as part of an ASM diskgroup, specify the FORCE option to the ASM SQL command. |