dasd-eckd.4170f2 <bus ID of the DASD>: The UID of the DASD has changed
Explanation
The Unique Identifier (UID) of a DASD that is currently in use has changed.
This indicates that the physical disk has been replaced.
User response
None if the replacement was intentional.
If the disk change is not expected, stop using the disk to prevent possible
data loss.