Thanks to Mihai from the FTS team, I managed to catch one such corrupted file and compared its contents with the correct one. I seems the beginning of every MB is corrupted, for example bytes that differ in this particular case are: 1MB -> 1MB + 5952 2MB -> 2MB + 6688 3MB -> 3MB + 5728 .... 403MB -> 403MB + 15632 I have the full info if this is necessary. The full size of the file is: 423436359 bytes Actual logs from the FST transfer: https://fts-pilot-010.cern.ch:8449/var/log/fts3/transfers/2021-02-23/webdav.lcg.triumf.ca__eosatlas.cern.ch/2021-02-23-0948__webdav.lcg.triumf.ca__eosatlas.cern.ch__1448324283__9c8bd9bc-75bb-11eb-bc6b-fa163e14af38 In the meantime, similar errors were identified also in EOSATLAS with apparently a higher incidence rate once we moved to XRootD 4.12.7. -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/xrootd/xrootd/issues/1404#issuecomment-784090544 ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-DEV list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-DEV&A=1