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We tested how solid-state drives (SSD) and multi-tasking, i.e., running more than one task per CPU core, affect performance and energy consumption in I/O intensive data analysis jobs in high-energy physics (HEP) computing. Our motivation for the study comes from the LHC experiment at CERN producing up to 15 petabytes of data annually. The data is analysed by a huge grid computing infrastructure containing more than 100 000 CPU cores over 140 computing centres in different countries. Our testsfatcat:lj47hwifkbfjlmg3hfsnyyrhqe