Oracle Error ORA-15066: offlining disk “string” in group “string” may result in a data loss

Oracle Error Message

ORA-15066: offlining disk “string” in group “string” may result in a data loss

Reason for the Error

Following I/O failures, the disks holding all copies of a data block were attempted to be taken offline.

Solution

Check the accompanying error messages for more information on the reason for the disk I/O failures.