Ken Merry committed CTL to HEAD for testing earlier this week.
From the commit message:
CTL is a disk and processor device emulation subsystem originally written for Copan Systems under Linux starting in 2003. It has been shipping in Copan (now SGI) products since 2005. It was ported to FreeBSD in 2008, and thanks to an agreement between SGI (who acquired Copan’s assets in 2010) and Spectra Logic in 2010, CTL is available under a BSD-style license. The intent behind the agreement was that Spectra would work to get CTL into the FreeBSD tree.
The FreeBSD Foundation spoke to Ken about the benefits of CTL and this is what he had to say.