[ghaff]

It is although I believe all the FT is now done in software in some fashion. i.e. the CPU/Memory/Chipset/IO, etc. are standard components with the lockstep done through a software layer. The same is true of HP Integrity Nonstop AFAIK. I used to follow these when I was industry analyst but I've been away from this space for a few years.

[makethetick]

They still do both, here's their hardware offering which is hardware and software based: http://www.stratus.com/solutions/platforms/ftserver/

And this is there software based solution which runs on commodity hardware: http://www.stratus.com/solutions/software/everrun-enterprise...

I only work with the latter but have heard the hardware offering is bulletproof.