Open Data File

Enter the Physical File Name (PFN) in the address bar, then press "Enter"

Some examples:

If you are at FNAL, open a data file in dCache at FNAL:
dcap://cmsdca.fnal.gov:24125/pnfs/fnal.gov/usr/cms/WAX/11/store/relval/CMSSW_3_3_0/RelValTTbar/GEN-SIM-RECO/MC_31X_V9-v1/0009/F651D737-75B7-DE11-BDD4-001D09F2512C.root
If you are at CERN, open a data file in castor at CERN:
rfio:/castor/cern.ch/cms/store/relval/CMSSW_3_3_0/RelValTTbar/GEN-SIM-RECO/MC_31X_V9-v1/0009/F651D737-75B7-DE11-BDD4-001D09F2512C.root
If you are at UCSD, open a data file in hadoop at UCSD:
/hadoop/cms/phedex/store/mc/Summer09/Zmumu/GEN-SIM-RECO/MC_31X_V3_SD_Mu9-v1/0003/06AA906F-F0AB-DE11-84C6-001EC9D27680.root