Infrequently the xrootd servers are scanned to find all the files that are on disk.
The results of these scans are available in
/nfs/farm/g/glast/u15/xrootd/files_on_disk/<YYYYMMDDTHHMMSS>
where <YYYYMMDDTHHMMSS> is the date the scan started.
In stead of starting at the top level the scan is broken into the directories
/glast/ASP, /glast/Data, /glast/bt, /glast/level0, /glast/mc
For each server there is one file per directory.
The file foramt is:
sizeBytes atime mtime ctime filename migrateStatus