On Thursday, HP fired back against last month that HP is trying to conceal information that would weaken its position in the case.

"Oracle argues in its Opposition that by moving to file its complaint under seal HP is trying to suppress the truth about the basis for its claims against Oracle. Nothing could be further from the truth," HP's lawyers wrote. "There is not a single word in HP's complaint that HP is not willing -- indeed eager -- to make public."

HP uses Intel's Itanium processor in servers running its HP-UX operating system. HP has accused Oracle of violating a contractual agreement when it decided to stop developing new software for Itanium. Oracle says there was no such legal agreement.

HP filed parts of its complaint under seal, including terms of a settlement agreement in the lawsuit that HP filed against its former CEO, Mark Hurd, after he took a job at Oracle. That settlement included a contractual commitment between the companies around continued product support, according to HP.

Oracle has minimized the significance of the pact, calling it no more than a "corporate hug" to show the companies had ended their animosity. Oracle also said that HP is trying to keep the settlement agreement under wraps because releasing it would hurt its case.