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Application Exercises 3-21
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Application Exercises
3-21. Excel Application: Analyzing Growth in Computer Storage Capacities
Pg. 89: Managing ICT Assets with a Database.
Since the computer hard drive was invented in 1956, a constantly increasing data storage capacity has been available at an ever-decreasing cost. Use the historical data of hard drive capacities and prices shown in Figure 3-29 (or download the Excel file named CH03Ex01). Modify the spreadsheet so that it includes a new column containing formulas that calculate a common measure of disk size (GB) and a second new column that computes the cost per GB for each year. (Recall 1 gigabyte = 1,024 megabytes; 1 terabyte = 1,024 gigabytes.) Now, create one line graph to show the cost per gigabyte from the period 1995 to 2016. Create a second line graph to show changes in the size of hard disks across the same period. (Tip: Use the “Hide” function to cover the columns you don’t need for each graph.) Write a brief summary of the trends you found. What factors have contributed to these trends? What are the implications of these trends?
Solve in this table
|
Year |
Size |
Price |
common measure of disk size (GB) |
cost per GB |
|
1980 |
26 MB |
$5,000 |
|
|
|
1981 |
63 MB |
$2,895 |
|
|
|
1983 |
20 MB |
$3,495 |
|
|
|
1984 |
20 MB |
$2,399 |
|
|
|
1987 |
40 MB |
$1,799 |
|
|
|
1989 |
20 MB |
$899 |
|
|
|
1995 |
1.7 GB |
$1,499 |
|
|
|
1996 |
3.2 GB |
$469 |
|
|
|
1997 |
7.0 GB |
$670 |
|
|
|
1998 |
8.4 GB |
$382 |
|
|
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1999 |
19.2 GB |
$512 |
|
|
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2000 |
27.3 GB |
$375 |
|
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2001 |
40 GB |
$238 |
|
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2002 |
100 GB |
$230 |
|
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2003 |
120 GB |
$168 |
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2004 |
250 GB |
$250 |
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2006 |
390 GB |
$106 |
|
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2008 |
1 TB |
$200 |
|
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2010 |
1.5 TB |
$220 |
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2011 |
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2012 |
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2013 |
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2014 |
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2015 |
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2016 |
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Figure 3-29
Hard drive capacities and costs by year.
