Worldwide external disk storage systems factory revenues posted year-over-year growth of 3.3%, totaling just over $5.9 billion, in the third quarter of 2012 (3Q12), according to the International Data Corporation (IDC) Worldwide Quarterly Disk Storage Systems Tracker. For the quarter, the total disk storage systems market posted just under $7.9 billion in revenues, representing 3.7% growth from the prior year's third quarter. Total disk storage systems capacity shipped reach 7,104 petabytes, growing 24.4% year over year. "The external disk storage system market continues to exhibit steady growth, posting solid third quarter factory revenues of just over $5.9 billion," said Liz Conner, senior research analyst, Storage Systems. "End users continue to invest in storage infrastructures despite persistent concerns surrounding global and regional economies. Helping to drive the worldwide market in the third quarter was the double-digit growth in multi-protocol storage architecture and strong demand for upper mid-range and high-end storage." "The disk storage systems market crossed an important milestone in the third quarter when the new capacity consumption surpassed seven exabytes for the first time," said Eric Sheppard, research director, Storage Systems. "This milestone occurred at a time of unfavorable economic conditions in Europe and improved utilization rates contributable to storage optimization technologies, suggesting demand for storage capacity is outstripping market headwinds." 3Q12 External Disk Storage Systems Results EMC maintained its lead in the external disk storage systems market with 30.0% revenue share in the third quarter, followed by NetApp and IBM, which are tied* for second with 11.9% and 11.7% market share, respectively. Hitachi and HP finished the quarter in a statistical tie* for the fourth position with 9.7% market shares each. Open Networked Disk Storage Systems Highlights The total open networked disk storage market (NAS Combined with Open / iSCSI SAN) grew 4.7% year over year in the third quarter to just over $5.1 billion in revenues. EMC continues to maintain its leadership in the total open networked storage market with 33.5% revenue share, followed by NetApp with a 13.7% revenue share. In the Open SAN market, which grew 4.4% year over year, EMC was the leading vendor with 29.8% revenue share, followed by IBM in second with 14.0% market share and Hitachi and HP tied* for third with 12.2% and 11.8% shares, respectively. The NAS market increased 5.7% year over year, led by EMC with 43.6% revenue share and followed by NetApp with 29.4% share. The iSCSI SAN market continues to show good growth, posting 6.9% revenue growth compared to the prior year's quarter. Dell led the market with 28.3% revenue share, followed by EMC in second with 19.8% market share. NetApp was in third with 13.3% market share.