NEW YORK ( The Deal) -- Data drive maker Western Digital Corp. ( WDC) will acquire VC-backed flash storage business Virident Systems Inc. for $685 million, the companies announced Monday, Sept. 9. The deal underscores the heightened interest in development of flash storage technology in recent years by both venture capital and large strategic players, such as EMC ( EMC), Hewlett-Packard ( HPQ), Dell ( DELL) and others, as flash memory deployments increase in corporate networks and data centers. "Virident brings key experience, advanced technology, and leading products into the fold to strengthen this effort. We are a market- and customer-driven company and will continue to look for ways in which to innovate and add value in the changing digital marketplace," said Western Digital president and CEO Stephen Milligan on a Monday conference call discussing the deal. Milpitas, Calif.-based Virident was founded in 2006 and employs about 175 people, including 120 engineers. About 75 of these are software developers, Western said. The target holds about 75 patents and has some operations in Bangalore, India. Its technology has virtualization, database, cloud computing and Web applications. The transaction gives the target a $645 million enterprise value less its expected cash on hand at the deal's closing. Virident CEO Mike Gustafson will join Western as senior vice president and continue to lead Virident while reporting to Mike Cordano, president of subsidiary HGST, the buyer said. Western Digital will fold the target into HGST. The deal, which should close in the fourth quarter, expands Virident's presence in enterprise solid-state drives, Western said. The market for these drives is predicted to grow from $2.5 billion in revenue worldwide in 2012 to $7 billion in sales by 2017, according to a May 2013 report from market research firm International Data Corp. "After continued study of this space, HGST concluded that solid-state memory for the enterprise and cloud is a strategic high-growth opportunity for it and its customers," said Milligan on the conference Monday. Western in December 2008 inked a development agreement with Intel ( INTC) to build solid-state technology, "to create a presence and then seize the opportunity," said Cordano on the conference call. "We saw the potential for enterprise SSD's, when they were still in a nascent state," he added.