Google still remembers some links:
http://w3.hepix.org/storage/hep_pdf/2009/Spring/maslennikov-storagewg-hepix.may2009.pdf
http://w3.hepix.org/storage/hep_pdf/2009/Spring/reuter.afs.osd.hepix.may2009.pdf
(search for "hepix afs performance comparison Maslennikov site:w3.hepix.org"), but everything under http://w3.hepix.org/storage/ now gives a 404. Would that material still be available somewhere?