How many cubic feet of storage space would require, Operating System

Q. Presume that we agree that 1 kilobyte is 1,024 bytes 1 megabyte is 1,0242 bytes and 1 gigabyte is 1,0243 bytes. This progression carries on through terabytes, petabytes, and exabytes (1, 0246). There are at present several new proposed scientific projects that plan to record and store a few Exabyte's of data during the next decade. To answer the subsequent questions you will require making a few reasonable assumptions stating the assumptions that you make.

a. How many disk drives would be necessary to hold 4 Exabyte of data?

b. How many magnetic tapes would be necessary to hold 4 Exabyte of data?

c. How many optical tapes would be necessary to hold 4 Exabyte of data (see Exercise 12.21)?

d. How several holographic storage cartridges would be required to hold 4 Exabyte of data (see Exercise 12.20)?

e. How many cubic feet of storage space would every option require?


a. Assume that a disk drive holds 10 GB. Then 100 disks hold 1 TB, 100,000 disks hold 1 PB, and 100,000,000 disks hold 1 EB. To store 4 EB would need about 400 million disks. If a magnetic tape holds 40 GB only 100 million tapes would be required. If an optical tape embraces 50 times more data than a magnetic tape 2 million optical tapes would suffice. If a holographic cartridge is able to store 180 GB about 22.2 million cartridges would be required.

b. A 3.5" disk drive is about 1" high 4" wide as well as 6" deep. In feet this is 1/12 by 1/3 by 1/2 or else 1/72 cubic feet. Packed densely the 400 million disks would inhabit 5.6 million cubic feet. If we permit a factor of two for air space and space for power supplies the required capacity is about 11 million cubic feet.

c. A 1/2" tape cartridge is around 1" high and 4.5" square. The volume is around 1/85 cubic feet. For 100 million magnetic tapes the packed densely the volume is about 1.2 million cubic feet. For 2 million optical tapes the volume is 23,400 cubic feet.

d. A CD-ROM is 4.75" in diameter in addition to about 1/16" thick. If we presume that a holo store disk is stored in a library slot that is 5" square and 1/8" wide we compute the volume of 22.2 million disks to be about 40000 cubic feet.

Posted Date: 7/29/2013 2:11:31 AM | Location : United States

Related Discussions:- How many cubic feet of storage space would require, Assignment Help, Ask Question on How many cubic feet of storage space would require, Get Answer, Expert's Help, How many cubic feet of storage space would require Discussions

Write discussion on How many cubic feet of storage space would require
Your posts are moderated
Related Questions
What is parsing Parsing is the procedure of analyzing a text, made of a sequence of tokens, to define its grammatical structure regarding to a given formal grammar. Parsing is

Making the Transition to Client - Server Programming Making the transition to client - server programming is a significant effort. Client - server applications must be designed

Q. Illustrate Scope of Consumer behaviour ? Scope of consumer behaviour is extremely wide due to following reasons: >>Ever rising intensifying competition. >>Additional a

Q. Why would it be an awful idea for gateways to pass broadcast packets between networks? What would be the merite of doing so? Answer: All broadcasts would be spreads to all

Long term scheduling Scheduling explicitly performed when a new process is created and it determines which programs are admitted to the system for processing. Therefore it cont

Question 1 What is Micro-kernel? What are the benefits of Micro-kernel? Question 2 Explain seven state process models used for OS with necessary diagram. Differentiate betwee

Entry-sequenced file organization The records in an entry-sequenced file are store up in the order they are written into the file. New records are for all time appended to

Optimal page replacement An optimal page replacement algorithm has the least page fault rate of all algorithms. The algorithm states that put back the page that will not be us

What problems arise if the directory structure is a general graph? Searching for a particular file may result in searching the similar directory many times. Deletion of the fil

Identifying parallelism A formal way to identify parallelism in an activity is to draw a task dependence graph in a directed graph in which each vertex represents a task to