Courtroom Clash Over Oksana's Computer

7/23/2010 9:00 AM PDT

Courtroom Clash Over Oksana Grigorieva's Computer

Everyone in court Tuesday wanted to know exactly what was on Oksana Grigorieva's hard drive ... sources tell TMZ.

Sources say Mel Gibson's lawyers wanted Oksana to ante up all the data in her computer -- a computer that contained a wealth of information about Oksana's relationship with Mel -- info that could establish Mel's culpability or innocence in connection with the January 6 blowup. The computer may also contain evidence that could either support or discredit claims that Oksana tried to extort Mel.  And the computer could be relevant in determining whether Oksana had any part in leaking the tapes.

We're told Mel's attorneys wanted full access and Oksana's lawyers wanted access restricted. 

In the end, sources say Judge Scott Gordon ruled that the independent, court-appointed expert could have limited access to the data in Oksana's computer.

In a related move, sources tell us Oksana is now backing up her hard drive, in case the Sheriff's Department seizes her computer as part of its criminal investigation.