James A O'Brien Introduction to Information Systems Eleventh Edition 12 Computer System Failure Controls Fault Tolerant Systems Fail-Ove Fail-Safe Fail-Soft Layer Threat Fault Tolerant Methods Applications Environmental, Application HW and SW redundancy, Faults Checkpoints Systems Outages System isolation Data security Databases Data errors Transaction histories,backup files Networks Transmission Alternate routing. errors error correcting routines Processes HW and SW Checkpoints faults Files Media Errors Replication of data Processors HW Faults Instruction retry James A. O’Brien Introduction to Information Systems Eleventh Edition 12 Computer System Failure Controls Applications Environmental, HW and SW Faults Application redundancy, Checkpoints Systems Outages System isolation Data security Databases Data errors Transaction histories, backup files Networks Transmission errors Alternate routing, error correcting routines Processes HW and SW faults Checkpoints Files Media Errors Replication of data Processors HW Faults Instruction retry Layer Threat Fault Tolerant Methods Fault Tolerant Systems Fail-Over Fail-Safe Fail-Soft