1. COP 5611 Operating Systems Spring 2010
Dan C. Marinescu
Office: HEC 439 B
Office hours: M-Wd 1:00-2:00 PM

2. Lecture 14 Reading Assignment: Chapter 8 from the online textbook
Homework 3 due on March 3
Midterm: Wednesday March 17, the first week after Spring Break
Last time:
Faults, Failures and Fault-Tolerant Design
Measures of Reliability and Failure Tolerance
Tolerating active Faults
Today:
Coding
Replication
Voting
Repair
Next time
Tolerating Software and Hardware Faults 2 2 2 2 2

3. Quad-component super-diode

4. Triple-redundant super-module with three voters

5. Reliability increases for triple-modular redundancy when mission time is short compared with MTTF

6. When mission time is comparable with MTTF reliability for the triple modular redundancy decreases

7. Failure points for a five-modular redundancy system