Toshiba Corp. (TOSYY) has resumed blocking Western Digital Corp.'s (WDC - Get Report) access to the data servers the two companies share from their micro chip joint venture, Reuters reported.

Toshiba has been seeking to sell the valuable unit, potentially for billions of dollars, to cover its own cost overruns, but Western Digital has been adamant that it needs to be part of the sales process. 

Toshiba allowed Western Digital access to the servers after the Superior Court of California granted a temporary restraining order. However, the California Court of Appeals issued a temporary stay, allowing Toshiba to resume blocking Western Digital's access. 

Western Digital plans to submit an opposition brief to that decision sometime in the coming days.

"The Court of Appeal issued this temporary stay based only on the brief submitted by Toshiba, and without consideration of SanDisk's opposition filing. SanDisk will file its opposition brief with the Court of Appeal in the coming days. Toshiba's petition for a stay of the TRO is separate from Toshiba's appeal of the merits of the TRO, and should not be interpreted to signal any potential outcome of the appeal," Western Digital said in an emailed statement. 

Editor's note: story has been updated since 7:52 AM EST.