The fate of the lucrative technology company Data Domain has set off a bidding war between two data storage rivals as they vie to control the emerging market for “deduplication” products.

Data Domain on Wednesday agreed to be acquired by NetApp for $1.9bn, or $30 a share in cash and stock. The offer from NetApp matched an all-cash bid from EMC made on Monday. NetApp and Data Domain originally agreed to a deal at $25 a share on May 20.