FRAMINGHAM, MA – The total disk storage systems market in the second quarter generated $7.7 billion in revenue, down 5% year-over-year, and had a slight sequential decline, says the International Data Corp.

Total disk storage systems capacity shipped reached 8.2 exabytes, up 21.5% year-over-year.

Worldwide external disk storage systems factory revenues posted a year-over-year decline in the second quarter of 0.8%, totaling just over $5.9 billion.

"Once again, spending on disk systems varied considerably by region," said Eric Sheppard, research director, storage. "Emerging markets experienced increases in demand while spending within mature markets, including the United States, Western Europe, Canada, and Japan, fell when compared to the same quarter a year ago. This reduced demand is creating a very competitive environment and a general deterioration in pricing, which seems to worsen market conditions."

EMC increased its lead in the external disk storage systems market with 31.3% revenue share during the quarter, followed by NetApp and IBM in a statistical tie for the number two position with 13.3% and 12.6% market share, respectively.

HP captured the third position with 10% market share, while Dell and Hitachi finished in a statistical tie for fourth with 7.6% and 7.1% market share, respectively.

The total open networked disk storage market grew 0.2% year-over-year during the quarter to about $5.2 billion in revenues. EMC continues to maintain its leadership in the total open networked storage market with 34.1% revenue share, followed by NetApp with 15.2% revenue share.

In the Open SAN market, which declined 0.6% year-over-year, EMC was the leading vendor with 29.7% revenue share, followed by IBM in second with 15% market share. HP and NetApp accounted for 13% and 9.5% of sales, respectively.

The NAS market increased 2.5% year-over-year, led by EMC with 46.3% revenue share, followed by NetApp with a 30.8% share.

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