Worldwide revenue from data storage systems rose 10.3% in the Q1 2006 to $4.2 bln, with the largest and most-expensive systems showing the fastest growth, IDC reported. EMC kept its top ranking, claiming 21.8% of the market, up from 21.4% a year earlier. Hewlett-Packard kept the #2 spot with 17.9% market share, unchanged from Q1 2005. IBM’s market share rose to 12% from 11.6%, keeping it in third place. Dell finished Q1 2006 with 8.2% market share, up from 7.8%. In fifth place was Hitachi Data Systems with 8.1% of the market.