This morning, EMC raised its offer for Data Domain to $2.1 billion from $1.8 billion, an 11 percent increase over its previous all-cash bid. Data Domain’s board had previously recommended that shareholders reject EMC’s $30-a-share cash bid in favor of a $30 cash-and-stock offer from NetApp (NTAP).

Hard to see the board doing so again now that the EMC (EMC) has sweetened the financial end of its proposal and removed some deal-protection provisions with which Data Domain (DDUP) had taken issue. With those gone, EMC’s bid is clearly superior to NetApp’s, CEO Joe Tucci claims, and it would be hard to argue otherwise.

“Over the past several weeks we’ve received strong support from many Data Domain stockholders and customers, validating our belief that EMC is Data Domain’s best choice,” Tucci wrote in a letter to Data Domain’s leadership. “With regulatory requirements now fulfilled, and in light of the clearly superior proposal we submitted to Data Domain’s Board of Directors today, we expect Data Domain to sign our definitive agreement that will deliver superior value in cash to the Data Domain stockholders in as little as two weeks.”

Data Domain has until midnight on July 17 to accept the offer.

UPDATE: NetApp responded to EMC’s announcement with the following statement:

“In response to EMC’s revised, unsolicited offer, the NetApp Board of Directors will carefully weigh its options, keeping in mind both its fiduciary duty to its stockholders and its disciplined acquisition strategy. We will provide an update shortly.”

This morning, EMC raised its offer for Data Domain to $2.1 billion from $1.8 billion, an 11 percent increase over its previous all-cash bid. Data Domain’s board had previously recommended that shareholders reject EMC’s $30-a-share cash bid in favor of a $30 cash-and-stock offer from NetApp (NTAP).

Hard to see the board doing so again now that the EMC (EMC) has sweetened the financial end of its proposal and removed some deal-protection provisions with which Data Domain (DDUP) had taken issue. With those gone, EMC’s bid is clearly superior to NetApp’s, CEO Joe Tucci claims, and it would be hard to argue otherwise.

“Over the past several weeks we’ve received strong support from many Data Domain stockholders and customers, validating our belief that EMC is Data Domain’s best choice,” Tucci wrote in a letter to Data Domain’s leadership. “With regulatory requirements now fulfilled, and in light of the clearly superior proposal we submitted to Data Domain’s Board of Directors today, we expect Data Domain to sign our definitive agreement that will deliver superior value in cash to the Data Domain stockholders in as little as two weeks.”

Data Domain has until midnight on July 17 to accept the offer.

UPDATE: NetApp responded to EMC’s announcement with the following statement:

“In response to EMC’s revised, unsolicited offer, the NetApp Board of Directors will carefully weigh its options, keeping in mind both its fiduciary duty to its stockholders and its disciplined acquisition strategy. We will provide an update shortly.”

On Monday the company once again said its bid for the data storage equipment maker Data Domain is “superior” to a competing offer from NetApp. This, despite the fact that Data Domain earlier in the day issued a statement recommending that shareholders reject EMC’s $30-a-share cash bid and instead accept a $30 cash-and-stock offer from NetApp.

“Our Board is committed to enhancing stockholder value and, after careful review with our outside advisors, determined that the $30 per share EMC Offer is not in the best interests of our stockholders at this time,” said Frank Slootman, president and CEO of Data Domain.

Why not? Well, among other things Data Domain hasn’t been able to discuss EMC’s offer because EMC hasn’t yet accepted the confidentiality and standstill agreement that would allow it to do so. For another, Data Domain must pay a $57 million termination fee if it should abandon its deal with NetApp–and that’s on top of a host of other considerable transaction expenses.

That’s understandable, I suppose. Still, it’s difficult to see why Data Domain insists that EMC’s all-cash offer is worth less than NetApp’s cash-and-paper bid. Unless it’s doing so to force EMC’s hand deeper into its wallet. And, indeed, that may be exactly what’s happening here. Sources say. EMC (EMC) could raise its offer to as much as $35 per share to win Data Domain (DDUP) or force NetApp (NTAP) to pay more than it can afford for it. “EMC is in the win-win box and NetApp is in the lose-lose box,” a source close to the company told Reuters. “EMC can pay more than NetApp can in a reasonable range. If NetApp wants to pay at an unreasonable range, that’s good for EMC.”

Apparently, Data Domain’s board did not find EMC’s offer to be the “win-win for both companies” that CEO Joe Tucci claimed. That said, its shareholders might. Apprised of the NetApp-Data Domain deal, EMC quickly issued a statement saying it plans go to the mat over this one. “EMC’s all-cash tender offer remains superior to NetApp’s proposed part-stock merger transaction,” Tucci said in a statement. “We are proceeding with our superior cash tender offer, which is not subject to any financing or due diligence contingency. We do not believe that the Data Domain stockholders will approve the merger transaction with NetApp. EMC urges the Board of Directors of Data Domain to not take any actions that would further impede a transaction that is a superior alternative for Data Domain’s shareholders.”

Apparently, Data Domain’s board did not find EMC’s offer to be the “win-win for both companies” that CEO Joe Tucci claimed. That said, its shareholders might. Apprised of the NetApp-Data Domain deal, EMC quickly issued a statement saying it plans go to the mat over this one. “EMC’s all-cash tender offer remains superior to NetApp’s proposed part-stock merger transaction,” Tucci said in a statement. “We are proceeding with our superior cash tender offer, which is not subject to any financing or due diligence contingency. We do not believe that the Data Domain stockholders will approve the merger transaction with NetApp. EMC urges the Board of Directors of Data Domain to not take any actions that would further impede a transaction that is a superior alternative for Data Domain’s shareholders.”

In short, NetApp’s stock is undervalued, so you’re getting a killer deal, and one free of regulatory scrutiny to boot. What’s not to like? Sadly for NetApp, it’s the $13.55 of its $30 a share bid offered in paper.