BSD/Linux slices like Solaris' Solstice DiskSuite

[r00t_0101]

Folks,
  Does anyone know how to create a true slice on a BSD/Linux node. I know that Solaris uses Solstice DiskSuite or some type of volume management where you are able to reboot to a particular partition through command-line instead of manual reboot. So whith that said, my goal is to create multiple slices (FreeBSD, Linux 6.x, Linux 7.x, etc ...) where I could ssh into a node to be able to reboot into another partition based on my work environment. This would be useful due to working remotely with different environments.

Thanks

 		
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