Quoting James Harper (james.harper@bendigoit.com.au):

This is kind of OT, but I'm hoping someone here is familiar with both Linux and BSD. Is there a BSD equivalent of kpartx, or is kpartx available for BSD? I'm exchanging emails with someone who is using BSD and trying to assist in solving a problem, but I know nothing about BSD.

kpartx and the rest of the multipath-tools are Linux-specific, on account of dependency on the Linux device-mapper kernel module. NetBSD includes a port of Linux lvm2tools and libdevmappers together with a device-mapper kernel driver specially written for NetBSD. See chap. 17 in http://www.netbsd.org/docs/guide/en/netbsd.html . Said port emerged from Adam Hamsik's 2008 work during Google's Summer of Code and was then merged into mainline. http://www.spinics.net/lists/dm-devel/msg07264.html http://code.google.com/p/google-summer-of-code-2008-netbsd/wiki/NetBSD_lvm (In general, I'm many years out of date on NetBSD, and so probably can't help you much beyond that. Also, this storage stuff is almost all outside of my areas of experience, so the above is at the edge of my competence or beyond it. You be the judge.)