Hard Disk Drive Fundamentals
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Questions and Answers

What is the path traced out by the hard drive read/write head as the disk rotates?

  • A triangle
  • A rectangle
  • A spiral
  • A circle (correct)
  • What is the shape formed by the sets of tracks for all the surfaces in a multi-platter disk drive?

  • A cylinder (correct)
  • A helix
  • A cone
  • A sphere
  • What is the relationship between the linear velocity of the disk and the constant angular velocity of the drive motor?

  • The linear velocity decreases with distance from the axis
  • The linear velocity is constant
  • The linear velocity is proportional to the square root of the distance from the axis
  • The linear velocity increases with distance from the axis (correct)
  • What is the time it takes for the hard-disk read/write head to move from one track to another called?

    <p>Seek time</p> Signup and view all the answers

    What system performance attribute is most increased by using redundant array of independent disks (RAID)?

    <p>Performance</p> Signup and view all the answers

    What is the logic used to detect errors in a special fault-tolerant computer system with an array of 3 disks?

    <p>Voting system</p> Signup and view all the answers

    What is the reason for waiting after the hard-disk read/write head is located over the desired track?

    <p>The disk needs to rotate to the beginning of the correct sector</p> Signup and view all the answers

    What is the advantage of using mirrored arrays with multiple disks?

    <p>Reduced access time for multi-block read</p> Signup and view all the answers

    What happens when the data from one disk differs from the other two in a fault-tolerant system?

    <p>The data where both match is accepted and the other is flagged as an error</p> Signup and view all the answers

    How many disks store exactly the same data in a mirrored array with 4 disks?

    <p>All 4 disks</p> Signup and view all the answers

    What is the shape formed by the tracks on a single surface of a multi-platter disk drive?

    <p>Circle</p> Signup and view all the answers

    What is the term for the circle traced out by the hard drive read/write head?

    <p>Cylinder</p> Signup and view all the answers

    In a disk drive with multiple platters, how do the heads on each surface align?

    <p>The heads are aligned</p> Signup and view all the answers

    What is the benefit of using a redundant array of independent disks (RAID)?

    <p>Enhanced system performance</p> Signup and view all the answers

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