One way to use contiguous allocation of the disk and not suffer from holes is to compact the disk every time a file is removed. Since all files are contiguous, copying a
file squires a seek and rotational delay to read the file, followed by the transfer at full speed. Writing the file back requires the same work. Assuming a seek time of 5 msec, a rotational delay of 4 msec, a transfer rate of 8 MB/sec, and an average file size of 8 KB, how long does it take to read a file into main memory and then write it back to the disk at a new location? Using these numbers, how long would it take to compact half of a 16-GB disk?

Answers

Answer 1

Answer:

The answer is below

Explanation:

a) Seek time = 5 msec, transfer time = 4 msec, transfer rate = 8 MB/sec = 8000 KB/sec, average file size = 8 KB

Transfer time = 8 KB ÷ 8000 KB/sec = 1 msec

The time required to read and write is twice the sum of the seek and transfer time.

Total time = (5 msec + 4 msec) * 2 + 1 msec = 19 msec

b) half of 16 GB = 8 GB = 8000000 KB

number of read and writes = (8000000 KB of total file size/ 8 KB of average file size) * 2 = 2000000

Transfer rate = 8 MB/sec = 0.008 GB/sec

Transfer time = 8 GB ÷ 0.008 GB/sec = 1000 sec

Total time = (5 msec + 4msec) * 2000000 + 1000 sec = 19000 sec


Related Questions

Using complete sentences post a detailed response to the following.

Many users do not like pop-ups such as alert boxes. Some people even have pop-up blockers in their browsers, which means that no boxes can pop up. As a website developer, would you include pop-up boxes? Why or why not? Should users block them in their browsers?

Answers

Answer:

No, I would not include pop-up ads in a website.

Explanation:

In my opinion, pop-up ads are very distracting and make it harder to navigate the website. If a website I'm on has too many pop-up ads I would leave. It drives people away and it annoys them.

Which of the following terms refers to the legal protection provided against
copying, distributing, performing, or changing both published and
unpublished works?
A.intangible property
B.tangible property
C.copyright
D.intellectual property

Answers

Answer:

The answer is C is your answer I guarantee it is I know it

BRAINLIEST TO THE BEST ANSWER!!!!!!!!!!!!!
In your own words in at least two paragraphs, explain why it is important, when developing a website, to create a sitemap and wireframe. Explain which process seems most important to you and why you feel most drawn to that process.

Answers

Answer:A sitemap break a website down to it's most basic components and a wirefram gives more details of what each page will contain but if you do have fleshed out content ready bring that content into your wireframed to see how it fits

Explanation:

What are benefits for robots doing work instead of humans?
What are some drawbacks for robots replacing humans?
write in complete sentences.

Answers

Answer:

Explanation:

Robots are able to complete tasks more efficiently and with more perfection than humans.

Humans in many production based jobs will loose their lively hood.

Which service uses a broadband connection?
Select one:
O a. DSL
O b. 3G and 4G
O c. dial up
O d. all connections use broadband

Answers

Answer:

d

Explanation:

because all in one question form

What is a commerce platform?

Answers

Answer:

In basic terms, a commerce platform simply refers to technology that enables a transaction (the commerce bit). The platform part allows you to overlay that technology across various channels such as online and in-store.

Answer:

Explanation:

a commerce platform simply refers to technology that enables a transaction (the commerce bit). The platform part allows you to overlay that technology across various channels such as online and in-store.20 Feb 2017

What is motherboard ?​

Answers

Answer:

A motherboard is the main printed circuit board in general-purpose computers and other expandable systems. It holds and allows communication between many of the crucial electronic components of a system, such as the central processing unit and memory, and provides connectors for other peripherals

Which security option should be used to ensure the integrity and validity of an Access database?

digital signature
database password
trust center options
start-up options

Answers

Answer:

The best security which could be used to ensure integrity and validity of Access database is:  

O. database password

Explanation:

Database password is the only option that best guarantee the integrity of an Access database due to the fact that, it limits the number of people who would be able to have access to it. This password is an administrative right given to those who are meant to access it and it is expected to be renewed every few months (probably every 3 months).

Without the password, no other person can be able to login. Also, no two individual can be able to login in same time using same credential login details assigned (that is, in scenario of using the same Username and password)

Answer:

A) digital signature

Explanation:

2. You go to an intemet cafe to send an email to your friend upon returning home you
realize that you forgot to log out your account. What probably could happen to your
account?​

Answers

There is a risk that someone else would gain access to your account as well as your personal information.

Pueden cojer los datos privados hackear la cuenta

meaning and explanation of fortran​

Answers

Definition of FORTRAN. : a computer programming language that resembles algebra in its notation and is widely used for scientific applications. Hope this helped!

Answer:

is a general-purpose, compiled imperative programming language that is especially suited to numeric computation and scientific computing.

Explanation:

Fortran, as derived from Formula Translating System, is a general-purpose, imperative programming language. It is used for numeric and scientific computing. Fortran was originally developed by IBM in the 1950s for scientific and engineering applications.

What technology standard is commonly used today for hard drives to interface with the motherboard in a system? pasago po salamat ^_^

Answers

Answer:

Serial Advanced Technology Attachment (SATA).

Explanation:

The hardware component of a computer can be defined as the physical parts or peripherals that enables it to work properly. Thus, the hardware components of a computer are the physical parts that can be seen and touched. Some examples of hardware components are monitor, speaker, central processing unit, motherboard, hard-drive, joystick, mouse, keyboard, etc.

Digital storage of data refers to the process which typically involves saving computer files or documents on magnetic storage devices usually having flash memory. Some examples of digital storage devices are hard drives, memory stick or cards, optical discs, cloud storage, etc. A reliable storage such as a hard-disk drive ensures that computer files or documents are easily accessible and could be retrieved in the event of a loss.

Serial ATA (SATA) is a technological standard which is commonly used today for hard drives to interface with the motherboard in a computer system. Thus, it's simply a bus interface on computer systems that is typically used for connecting mass storage devices to host bus adapters such as motherboards.

Generally, SATA comprises of two ports and these are the power and data connector.

Miriam Is a network administrator. A few employees want to access sensitive Information stored on a backup device. She wants to give access
rights these employees. Which option will she use?
ОА.
remote desktop
ОВ.
monitoring service
Oc.
user accounts
OD.
print service
OE.
directory service

Answers

Answer:

C. user accounts

Explanation:

An access control can be defined as a security technique use for determining whether an individual has the minimum requirements or credentials to access or view resources on a computer by ensuring that they are who they claim to be.

Simply stated, access control is the process of verifying the identity of an individual or electronic device. Authentication work based on the principle (framework) of matching an incoming request from a user or electronic device to a set of uniquely defined credentials.

Basically, authentication and authorization is used in access control, to ensure a user is truly who he or she claims to be, as well as confirm that an electronic device is valid through the process of verification

Hence, an access control list primarily is composed of a set of permissions and operations associated with a NTFS file such as full control, read only, write, read and execute and modify.

Generally, access control list are defined for specific user accounts and may either be an administrator, standard user or guest account.

In this scenario, Miriam a network administrator wants to give access rights to employees who are interested in accessing sensitive Information stored on a backup device. Thus, the option Miriam should use is user account.

Answer:

user accounts

Explanation:

N an AWS design template, the "depends on" property of a resource is represented by an _________ color dot. Red Orchid Blue Black

Answers

Answer:

Black

Explanation:

Explicit dependencies in Amazon Web Services are used to determine the order in which resources are added or deleted on AWS Cloud Formation. If a user wishes to create explicit dependency, a line from the "dependson" dot located at the route is moved to the gateway-VPC attachment.

The "dependson" dot helps to specify which resource is created before another. It is signified by a black dot (*). It can be used to override parallelisms and also to determine when a wait condition becomes activated.

algorithm of how to calculate the area of a square.

Answers

Answer:

In order to calculate area of a square, 'A' be the area of square and the length of the square be 'a'. Then we need to calculate A= a*a. Step 2 :- Accept as input, the length of the sides of the square, and store the value in variable a. Step 3 :- Calculate the area of the square (a*a) and store in a variable A.

Explanation:

Answer:

Area = side x side. For example, the area of a square of each side of length 8 feet is 8 times 8 or 64 square feet.

what is the output of this line of code
print("hello" + "goodbye")
A - "hello" + "goodbye"
B- hello + goodbye
C - hello goodbye
D - hellogoodbye

Answers

Answer:

D - hellogoodbye

Explanation:

since your merging two string together you will simply just get one string in total

Answer:

D

Explanation:

Hey, Another question. I'm sure it's possible in the future, but I wanted to ask if HIE would be possible. I'm sure it would be, I just want to hear other people's comments on this. (Beatless)

Answers

Answer:

Originally Answered: Will there ever be a band as big as the Beatles? No, there will never be a band as popular as the Beatles. For one thing they were exceptionally good in a time of great music in general.

Explanation:

please mark this answer as brainliest

and, or, not are examples of boolean logic

Answers

true a example  boolean logic is (and, or, and  not)

-scav

1.The hardware that allows data to be transmitted from a computer along a telephone line to another computer at the other end is a_____

modem

keyboard

visual display unit

printer



Answers

So this is called a modem we use it to send  and receive info over telephone lines

Hope this helps

-scav

1. What are you going to do if someone ask for your personal information online?​

Answers

Answer:

Ask them why they need such information.

Explanation:

If they can't give you a good reason, please don't share your personal info. ♥

Answer:

If someone ask my personal information online i'll  trun off  my mobile data or wi-fi  and then i'll block the user's Id

Explanation:

hope it is helpful to you

ASAP PLZZ

1. In the space below, explain how the Table Tools can be accessed in Word.

Answers

Answer:

Creating a Table

1) Click the Insert tab on the Ribbon

2) Click on Table

3) Highlight the number of columns and rows you’d like

OR

4) Click Insert Table

5) Click the arrows to select the desired number of columns

6) Click the arrows to select the desired number of rows

7) Click OK

The photograph shows a way individuals work together in groups a the photograph​

Answers

Answer:

D. Administrators

Explanation:

Hope it helps

#CarryOnLearning

what would happen without satellites???

Answers

Answer: without satellites there would be no way for the world to communicate

Explanation:

Answer:

Explanation:

Without satellites, we wouldn't have much choice in our television programs either, because there would be no more direct-to-home broadcasting, and cable operators would no longer have easy access to such a wide variety of channels.

List two building techniques or materials that should be considered if you are building in Tornado Alley.

Answers

Have a strong foundation and a tornado shelter.

Which of the following best describes the protocols used on the Internet?

The protocols of the Internet are designed by government agencies to ensure they remain free to use

The protocols of the Internet are secret to maintain the privacy and security of people using them

Each device connected to the Internet will use a protocol designed by the company that manufactured it

The protocols of the Internet are open and used by all devices connected to the network

Answers

The protocols of the Internet are open and used by all devices connected to the network

-scav

A friend is working on piecing together a computer. He calls and explains that he needs to buy a circuit board with ports and sockets that connects the main devices of his computer. Which computer component is he most likely explaining? Group of answer choices

Answers

So this component is the motherboard

Hope this helps.

-scav

What is the purpose of a hyperlink in a presentation?
A to add a joke to a presentation
B to create an attractive image
C to connect a user to a new slide, a file, or a webpage
D to keep track of the order of slides

Answers

Answer:

Answer:c to connect a user to a new slide, a file, or a webpage

Explanation:

Explanation:c

Answer:

c

Explanation:

jdr-wivg-vmb
co.me a.nd jo.in fa.st...
go.ogle me.et​​​​​

Answers

Explanation:

what is this don't post like this

name the default Package of java

Answers

Answer:

java.lang package

Explanation:

Java compiler imports java. lang package internally by default. It provides the fundamental classes that are necessary to design a basic Java program.

how do i turn off itallics on a school chromebook i accidentally turned them on in another tab and i dont know how to undo them

Answers

u go in to the bar with i b u the is italics and u press it again and it will turn it off but u have to have the text selected

The following procedure is intended to return true if the list of numbers myList contains only positive numbers and is intended to return false otherwise. The procedure does not work as intended. PROCEDURE allPositive(myList) { index ←← 1 len ←← LENGTH(myList) REPEAT len TIMES { IF(myList[index] > 0) { RETURN(true) } index ←← index + 1 } RETURN(false) } For which of the following contents of myList does the procedure NOT return the intended result?

Answers

Answer:

[-1, 0, 1]

Explanation:

Given

The above procedure

Required

Which list does not work as intended

The question has missing options (the options are available online).

From the question, we understand the procedure is to return true for lists that contain only positive numbers.

However, the list does not work for [-1, 0, 1]

The reason is that; the procedure starts checking from index 1.

i.e. index ←← 1

In [-1, 0, 1], the element at index 0 is negative (-1).

Since the procedure starts checking from index 1, the procedure will not check the element at index 0 (i.e. -1).

Hence, it will return true, instead of false

In this exercise we have to use the knowledge of computational language in python, so we have that code is:

It can be found in the attached image.

So, to make it easier, the code in python can be found below:

NumList = []

Number = int(input("Please enter the Total Number of List Elements: "))

for i in range(1, Number + 1):

   value = int(input("Please enter the Value of %d Element : " %i))

   NumList.append(value)

print("\nPositive Numbers in this List are : ")

for j in range(Number):

   if(NumList[j] >= 0):

       print(NumList[j], end = '   ')

See more about python at brainly.com/question/2266606

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