EMC kept its No. 1 ranking in IDC's quarterly survey of the worldwide market for external disk storage systems with 20 percent share, but it faced stiff competition from Hewlett-Packard, which was in a statistical tie for the top spot with an estimated 19.3 percent share, IDC reported.
Storage revenue at HP rose 10 percent from the year-earlier period while EMC's storage revenue growth slowed to 3 percent from 13 percent in the first quarter, IDC estimated in the report released Friday.
In the second quarter, the data storage market as a whole grew 8.5 percent year over year to $4.15 billion, IDC estimated. Storage is among the fastest-growing sectors in technology as companies produce ever-greater quantities of data such as payroll and banking information and documents to comply with government rules.
IBM retained its third-place ranking in the survey, with 13.2 percent of the market, but its storage revenue growth slowed to 3.7 percent from 15 percent in the first quarter.
Hitachi Data Systems, Dell, and Sun ended the quarter in a statistical tie for fourth place with 8 percent, 7.8 percent and 7.1 percent market share, respectively. Hitachi Data Systems is the storage business of Japan's Hitachi.
Sun grew the fastest of the major storage vendors, with 19 percent revenue growth to $295 million. Hitachi's storage revenue surged 17 percent to $332 million, IDC estimated.
EMC had estimated revenue growth of 3 percent. Dell, which resells EMC storage systems to corporate customers, had growth of 3.5 percent, according to the survey.
Separately, IDC reported earlier this month thatin the worldwide market for servers.