Comparing the advantages and disadvantages for duplex redundancy we have the following situation.

Advantages:

• It is applicable to duplex, active redundant modes or separate elements.
• It maintains function for n-1 failures.
• It protects against open and short failure modes and errors.
• The faulty units can be repaired without disrupting the computer.

• It may require diagnostic programmes.
• The increased complexity is due to sensing and switching elements.
• The storage capacity requirements may increase due to redundant data requirements.