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Integrated and Modular Systems for Commercial ... - Nonstop Systems

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Redundancy<br />

Note: curves are <strong>for</strong> fail-passive configs, except those shown <strong>for</strong> simplex, cube, <strong>and</strong> n-parallel<br />

1.0<br />

R config(t)<br />

0.5<br />

1/e<br />

0<br />

dual<br />

dual-dual<br />

quad<br />

t =MTTFunit<br />

1<br />

dual-triplex<br />

triplex<br />

dual-quad<br />

2<br />

- fault-tolerant configs exhibit<br />

s-curve reliability -<br />

t<br />

MTTF unit<br />

3<br />

= MTTF<br />

cube<br />

4-parallel<br />

3-parallel<br />

2-parallel<br />

simplex<br />

44<br />

©1995-1997 F.M.G. Dörenberg

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