Log on to the bitarchive machines of the SB replica (sb-test-bar-001.statsbiblioteket.dk).
Find the locations of the baseDir of the bitarchives:
grep baseFileDir ~/TEST3/conf/settings_BitarchiveApplication.xml
Note that TEST3 can be different in your installation
Go to one of the filedir of the bitarchive application (relativ to these baseFileDir)
Move a file to attic dir
> mv 1-metadata-1.arc ../atticdir/.