An unused partition is returned by sfdisk as type ' 0' not '0' (space).
An unused partition is returned by sfdisk as type ' 0' not '0' (space).

This is true in Ubuntu 14 as well as 16, don't know why we didn't see
this sooner.

nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome