Q:

The mean time to failure of a single disk is 200000 hrs. If an array of disks is using 5 such disks, the mttf of the array is

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The mean time to failure of a single disk is 200000 hrs. If an array of disks is using 5 such disks, the mttf of the array is


  1. 200000 hrs
  2. 40000 hrs
  3. 1000000 hrs
  4. Can not be determined

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 (b).40000 hrs

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