GLESR104E [%d] The "eeadm tape datamigrate" command doesn't support files written by the older format. (file:%s)
Explanation
The files in the source pool were written by an IBM Storage Archive EE older than version 1.2. The "eeadm tape datamigrate" command is not supported for those files.
Operator response
Do not use the "eeadm tape datamigrate" command for those files. Copy those files to another directory and migrate them to new pools.