Maurice Tutor

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    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Phoniex University
    Oct-2001 - Nov-2016

Category > Computer Science Posted 23 Sep 2017 My Price 5.00

disk specifications

Consider again the disk specifications from 7.5 and suppose that a block size of 1,024 bytes is chosen. Suppose that a file containing 100,000 records of 100 bytes each is to be stored on such a disk and that no record is allowed to span two blocks.

1. How many records fit onto a block?

2. How many blocks are required to store the entire file? If the file is arranged sequentially on disk, how many surfaces are needed?

3. How many records of 100 bytes each can be stored using this disk?

4. If pages are stored sequentially on disk, with page 1 on block 1 of track 1, what is the page stored on block 1 of track 1 on the next disk surface? How would your answer change if the disk were capable of reading/writing from all heads in parallel?

5. What is the time required to read a file containing 100,000 records of 100 bytes each sequentially? Again, how would your answer change if the disk were capable of reading/ writing from all heads in parallel (and the data was arranged optimally)?

6. What is the time required to read a file containing 100,000 records of 100 bytes each in some random order? Note that in order to read a record, the block containing the record has to be fetched from disk. Assume that each block request incurs the average seek time and rotational delay.

Answers

Maurice Tutor
(5)
Status NEW Posted 23 Sep 2017 08:09 AM My Price 5.00

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