Hewlett-Packard Co. (HP) is putting the finishing touches on a new release of its Unix operating system that will deliver a long-awaited virtualization capability to the company's Integrity line of servers. The update will be available by the beginning of July as a patch release to the company's HP-UX 11iv2 operating system. The virtualization technology, called Virtual Partitions, or vPars, allows users to install more than one copy of HP-UX on a computer. HP has included this feature in its HP 9000 line of Unix servers for years, but this release will mark the first time it has been made available for Integrity, which uses Intel Corp.'s Itanium 2 processor. "VPars will be shipping in several weeks," said Mary Ellen Lewandowski director of Unix product marketing with HP. To date, the older HP 9000 line has had a richer set of features than Integrity, but HP has been working to narrow that gap.