Hi, Wilko thanks for the solution. I set the oss.cache directive and indeed, now it works. > The olbd needs the oss.cache (or equivalent the olb.cache) directive to > place the file. > # 'inplace' means that the file is not put into the cache > oss.path / inplace And indeed, if I remove the oss.cache directive, even while keeping the "oss.path xyz inplace" statement, I'm again denied. I don't understand yet, why this is needed in the file creation via redirector case, but not in the case where I write directly to the xrootd on the leaf node. Probably the cache statement somehow triggers the writable/free space information to the master olbd. Cheers, Derek -- Dr. Derek Feichtinger Tel: +41 22 767 10 07 LCG/ARDA Group email: [log in to unmask] CERN http://people.web.psi.ch/feichtinger CH-1211 Genève 23