DFS3185I LARGE BLOCK INTERFACE DETECTED, IT WILL BE USED FOR DDNAME .......
Explanation
The Image Copy Utility has determined that the image copy output data set is on a device that supports the Large Block Interface. However, no explicit block size was specified.
System action
The Image Copy Utility uses the Large Block Interface with a system determined block size to write the image copy.
Operator response
No action is required.