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Hi, I'm opening a file with the following opaque data: root://xrootd.unl.edu:1094//store/data/Run2010B/BTau/AOD/Dec4ReReco_v1/0007/B26C2B64-E101-E011-9C89-002481E14F38.root?readaheadsz=32768&cachesz=327680 I.e., I would expect the minimal read size is 32KB. However, I see the following read pattern: 110127 16:11:34 001 Xrd: Read: Hole in the cache: offs=2673920000, len=55 110127 16:11:34 001 Xrd: Read: Hole in the cache: offs=2673920512, len=145 110127 16:11:34 001 Xrd: Read: Hole in the cache: offs=2673921024, len=70 110127 16:11:34 001 Xrd: Read: Hole in the cache: offs=2673921536, len=154 110127 16:11:34 001 Xrd: Read: Hole in the cache: offs=2673922048, len=24 110127 16:11:35 001 Xrd: Read: Hole in the cache: offs=2673922560, len=162 I would have expected all these reads to be handled by the cache. This is with ROOT 5.27.06b. Brian