Jeff Findley wrote:
And hope the wiring didn't get botched between the controllers and all
those engines, resulting in a good engine being turned off and the bad
one going kablooey.

That particular Russian failure ought to have been caught during pre-launch
testing, but they were in a race to beat the Americans and corners were cut
in the name of time. Hopefully SpaceX is more detail oriented than the
Russians were during the space race.

The joys of KORD, a "reliability-improving" system that seemed almost
designed to cause a rocket to fail:
http://catless.ncl.ac.uk/Risks/21.53.html#subj4


Pat