An analyst on Tuesday lowered his expectations for data storage system providers EMC (EMC) and Fusion-io (FIO), based on competitive and economic issues. Jason Ader, of William Blair, gave several reasons for lowering his outlook on Fusion-io. Among them were slower-than-expected sales to large business customers, "leading us to believe the company will struggle to meet expectations for the full fiscal year." The company's shares were down 8%