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Question: what is the failure rate of a system with the...

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  1. What is the failure rate of a system with the following components and MTTF ratings, assuming that failure rates are independent:
  • 20 disks, each with a 1,250,000 MTTF
  • 1 ATA (Advanced Technology Attachment) controller with an MTTF of 600,000 hours
  • 1 power supply with a rating of a 150,000-hour MTTF
  • 1 cooling device (e.g., a fan) with an MTTF rating of 250,000 hours
  • 1 ATA cable with a 1,000,000-hour MTTF
  1. Choose a synthetic benchmark, other than SPEC, and give a brief (2-3 paragraph) description of the factors it evaluates (integer performance, floating-point operations, etc.), and the basic testing procedure.
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