Nexenta OS, officially known as the Nexenta Core Platform, is a discontinued computer operating system based on OpenSolaris and Ubuntu that runs on IA-32- and x86-64-based systems. It emerged in fall 2005, after Sun Microsystems started the OpenSolaris project in June of that year. Nexenta Systems, Inc. initiated the project and sponsored its development. Nexenta OS version 1.0 was released in February 2008. In late 2011, the Nexenta OS brand was terminated and replaced with Illumian, which is derived from community development for illumos and OpenIndiana, but was distinguished by its use of Debian packaging. Illumian version 1.0 was released in February 2012. Following the initial release of Illumian in 2012, the Illumian project was discontinued. Repositories There were initially two official APT repositories: "testing" and "unstable", totalling more than 9000 packages. A third "stable" was added for the first official release. Nexenta OS is available as InstallCD and VMware images. A Live CD is also available, but only for releases up to alpha 5. Nexenta repositories follow the general Debian structure (main contrib non-free). Stable releases use a subset of this structure. Packages originate from Debian GNU/Linux. The nexenta.org website was retired in early 2012. Development Since Nexenta OS does not use the Linux kernel, and Sun only recently began releasing the code of their Solaris operating system as free and open source software, it supports less diverse hardware than other Debian variants. The Nexenta OS team has decided to focus on a minimal OpenSolaris effort called the Nexenta Core Platform (NCP) which forms the basis of the NexentaStor NAS storage solution. Version 1.0 of Nexenta Core Platform was released on February 10, 2008. Nexenta Core Platform was the first operating system to combine the OpenSolaris kernel with GNU userland tools. It aimed to bring technologies such as ZFS and Zones to the GNU/Debian community. An additional purpose of the OS was to provide a kernel allowing proprietary closed source hardware drivers to be produced for inclusion in an open source operating system. Releases and History Nexenta Core Platform 1.0 was released on February 10, 2008. It was based on Ubuntu 6.06 "Dapper Drake" and OpenSolaris b82. The release included: ZFS root/boot Zones integrated with dpkg/apt-get BrandZ with preconfigured support for Debian and Ubuntu Stable toolchain Server/storage software support Xen DomU/Dom0 Nexenta Core Platform 2.0 was released on May 25, 2009. It included packages based on Ubuntu 8.04 "Hardy