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The interval between the instant a computer makes a request for the transfer of data from a disk system to the primary storage and the instance this operation is completed is called _________.
- a)Disk arrival time
- b)Disk access time
- c)Drive utilization time
- d)Disk utilization time
- e)None of these
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
The interval between the instant a computer makes a request for the t...
The interval between the instant a computer makes a request for the transfer of data from a disk system to the primary storage and the instance this operation is completed is called Disk access time. Disk access time is always given as an average, because seek time and latency vary depending on the current position of the head and platter. Like access times of fast hard disks are typically from 5 to 10 milliseconds, solid state drive (SSD) access times are in the 25 to 100 microsecond range.
Hence, the correct option is (B).
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The interval between the instant a computer makes a request for the t...
Disk Access Time
Disk access time refers to the interval between the moment a computer sends a request for data transfer from a disk system to the primary storage and the moment this operation is completed. It is an important factor in determining the overall performance of a computer system, particularly in terms of data retrieval and storage.
Components of Disk Access Time
Disk access time can be broken down into several components, each of which contributes to the overall time it takes for the data transfer to occur. These components include:
1. Seek Time: Seek time is the time it takes for the disk's read/write head to move to the desired track on the disk. It involves physically moving the head across the surface of the disk, and it is typically one of the largest contributors to the overall access time.
2. Rotational Latency: Rotational latency refers to the time it takes for the desired sector of the disk to rotate under the read/write head. This time is determined by the rotational speed of the disk and is usually measured in milliseconds.
3. Data Transfer Time: Once the read/write head is positioned correctly and the desired sector is under the head, the data can be transferred from the disk to the primary storage. The time it takes for this transfer to occur is known as the data transfer time.
4. Controller Overhead: The controller overhead refers to the time it takes for the disk controller to process the request and coordinate the data transfer between the disk and the primary storage. This overhead can vary depending on the efficiency of the disk controller.
Importance of Disk Access Time
Disk access time is a critical factor in determining the performance of a computer system, particularly in tasks that involve frequent data retrieval and storage. A shorter access time means that the computer can retrieve and store data more quickly, resulting in improved overall system performance.
Conclusion
In conclusion, the interval between the moment a computer sends a request for data transfer from a disk system to the primary storage and the moment this operation is completed is known as disk access time. It is influenced by factors such as seek time, rotational latency, data transfer time, and controller overhead. By reducing the disk access time, the overall performance of the computer system can be significantly improved.
Disk access time refers to the interval between the moment a computer sends a request for data transfer from a disk system to the primary storage and the moment this operation is completed. It is an important factor in determining the overall performance of a computer system, particularly in terms of data retrieval and storage.
Components of Disk Access Time
Disk access time can be broken down into several components, each of which contributes to the overall time it takes for the data transfer to occur. These components include:
1. Seek Time: Seek time is the time it takes for the disk's read/write head to move to the desired track on the disk. It involves physically moving the head across the surface of the disk, and it is typically one of the largest contributors to the overall access time.
2. Rotational Latency: Rotational latency refers to the time it takes for the desired sector of the disk to rotate under the read/write head. This time is determined by the rotational speed of the disk and is usually measured in milliseconds.
3. Data Transfer Time: Once the read/write head is positioned correctly and the desired sector is under the head, the data can be transferred from the disk to the primary storage. The time it takes for this transfer to occur is known as the data transfer time.
4. Controller Overhead: The controller overhead refers to the time it takes for the disk controller to process the request and coordinate the data transfer between the disk and the primary storage. This overhead can vary depending on the efficiency of the disk controller.
Importance of Disk Access Time
Disk access time is a critical factor in determining the performance of a computer system, particularly in tasks that involve frequent data retrieval and storage. A shorter access time means that the computer can retrieve and store data more quickly, resulting in improved overall system performance.
Conclusion
In conclusion, the interval between the moment a computer sends a request for data transfer from a disk system to the primary storage and the moment this operation is completed is known as disk access time. It is influenced by factors such as seek time, rotational latency, data transfer time, and controller overhead. By reducing the disk access time, the overall performance of the computer system can be significantly improved.
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