Hard Disk Drives: Head Crash and Disk Cache
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Questions and Answers

What is the primary advantage of RAID 1 (Mirroring)?

  • No need to rebuild data if a drive fails (correct)
  • Improved data transfer speeds
  • Doubles the effective storage capacity
  • Hot swapping capability for failed drives
  • Which RAID level combines the features of both RAID 1 and RAID 0?

  • RAID 2
  • RAID 10 (correct)
  • RAID 5
  • RAID 6
  • Why does RAID 1 have an effective storage capacity that is only half of the total drive capacity?

  • Data are stored twice to provide fault tolerance (correct)
  • It requires triple data redundancy
  • It uses a mix of SSD and HDD drives
  • Software RAID 1 solutions do not allow data compression
  • Which RAID level is known for its excellent read speed and write-speed, comparable to that of a single drive?

    <p>RAID 1</p> Signup and view all the answers

    In the context of RAID 1 solutions, what is a common disadvantage of software RAID implementations?

    <p>Not supporting hot swapping of failed drives</p> Signup and view all the answers

    Which feature distinguishes RAID 10 from other RAID types in terms of data storage?

    <p>Striping for improved transfer speeds</p> Signup and view all the answers

    What is the main advantage of a RAID 10 configuration?

    <p>The rebuild time in case of a disk failure is very fast due to mirroring.</p> Signup and view all the answers

    Which of the following is NOT a benefit of flash memory storage?

    <p>Flash memory is the most cost-effective storage solution.</p> Signup and view all the answers

    What is the main disadvantage of using an external hard drive for storage?

    <p>External hard drives have moving parts which can lead to mechanical failure.</p> Signup and view all the answers

    What is the primary difference between storage and memory in a computer system?

    <p>Memory is used for temporary data, while storage is used for long-term data.</p> Signup and view all the answers

    What is a Network Attached Storage (NAS) device used for?

    <p>A NAS device is used for providing additional storage capacity to a computer network.</p> Signup and view all the answers

    What is the main difference between storage and memory?

    <p>Memory is volatile, while storage is non-volatile</p> Signup and view all the answers

    What is a network attached storage (NAS) device?

    <p>A device that is used to store data in a network</p> Signup and view all the answers

    What is the capacity of a hard disk drive?

    <p>1 terabyte</p> Signup and view all the answers

    What is the access time of a hard disk drive?

    <p>1 millisecond</p> Signup and view all the answers

    What is RAID 0?

    <p>A RAID level that uses multiple drives for data storage</p> Signup and view all the answers

    What is a disk cache?

    <p>A memory chip on a hard disk that stores frequently accessed data</p> Signup and view all the answers

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