Question

'Assume that there is a 5% rate of disk drive failure in a year: a. If all your computer data is stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probability that during year; you can avoid catastrophe with at least one working drive? b. If copies of all your computer data are stored on four independent hard disk drives, what is the probability that during a year; you can avoid catastrophe with at least one working drive? a. With two hard disk drives, the probability that catastrophe can be avoided is (Round to four decimal places as needed:)'

          'Assume that there is a 5% rate of disk drive failure in a year:
a. If all your computer data is stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probability that during year; you can avoid catastrophe with at least one working drive? b. If copies of all your computer data are stored on four independent hard disk drives, what is the probability that during a year; you can avoid catastrophe with at least one working drive?
a. With two hard disk drives, the probability that catastrophe can be avoided is (Round to four decimal places as needed:)'

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Added by Gonzalo T.

Computer Science and Information Technology

Trishna Knowledge Systems 2018 Edition

Instant Answer

Solved by Expert Akash M

09/21/2023

Step 1

Since there is a 5% chance of failure, there is a 95% chance of it not failing. In decimal form, this is 0.95. a. Now, let's consider the two hard disk drives. We want to find the probability that at least one of them is working. To do this, we can find the Show more…

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'Assume that there is a 5% rate of disk drive failure in a year: a. If all your computer data is stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probability that during year; you can avoid catastrophe with at least one working drive? b. If copies of all your computer data are stored on four independent hard disk drives, what is the probability that during a year; you can avoid catastrophe with at least one working drive? a. With two hard disk drives, the probability that catastrophe can be avoided is (Round to four decimal places as needed:)'

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