Sun Microsystems Inc. yesterday filed a countersuit against rival Network Appliance over patent infringement allegations regarding network storage management software. Sun filed suit in U.S. District Court in Eastern Texas against the entire NetApp product line, seeking both an injunction and monetary damages.
“It’s a responsive action we take not because we want to, but rather because we are forced to,” said Mike Dillon, Sun’s general counsel, in a blog posting yesterday.
The Sun filing is in response to a NetApp suit filed against Sun Sept. 5, also in Texas, alleging Sun’s Zettabyte File System (ZFS) infringed on seven NetApp patents for its Write Anywhere File Layout (WAFL) and RAID technology. NetApp claims that Sun infringed its patents when it released ZFS in 2005 and then released code for it under an open source license this year, as Sun has done with much of its other software.
The NetApp suit followed negotiations going back to 2004 when StorageTek accused NetApp of violating its patents for storage file management software. StorageTek was subsequently acquired in 2005 by Sun, which continued to press the patent infringement allegations against NetApp. Negotiations between the companies eventually led to NetApp’s claim that Sun uses NetApp-patented technology in ZFS.
In a blog posting Wednesday, Sun CEO Jonathan Schwartz acknowledged that open source ZFS is an economic threat to proprietary products such as NetApp’s, but that NetApp’s case has no merit.