answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
LuckyWell [14K]
2 years ago
5

Consider a disk that rotates at 3600 rpm. The seek time to move the head between adjacent tracks is 2 ms. There are 32 sectors p

er track, which are stored in linear order from sector 0 through sector 31. The head sees the sectors in ascending order. Assume the read/write head is positioned at the start of sector 1 on track 8. There is a main memory buffer large enough to hold an entire track. Data is transferred between disk locations by reading from the source track into the main memory buffer and then writing the data from the buffer to the target track. a. How long will it take to transfer sector 1 on track 8 to sector 1 on track 9
Computers and Technology
1 answer:
jasenka [17]2 years ago
3 0

Answer:

19.71 ms

Explanation:

The disk rotates at 3600 rpm, hence the time for one revolution = 60 / 3600 rpm = 16.67 ms.

Hence time to read or write on a sector = time for one revolution / number of sectors per track = 16.67 ms / 32 sectors = 0.52 ms

Head movement time from track 8 to track  9 = seek time = 2 ms

rotation time to head up sector 1 on track 8 to sector 1 on track 9 = 16.67 * 31/32 = 16.15 ms

The total time = sector read time +head movement time + rotational delay + sector write time = 0.52 ms + 2 ms + 16.15 ms + 0.52 ms = 19.19 ms

You might be interested in
What permanent magnets of a motor are replaced with more powerful ones, what effect do you think this would have on motor rotati
Marat540 [252]
When permanent magnets of a motor are replaced with more powerful ones, the motor rotation will increase. This is because there is more electricity being generated.
7 0
2 years ago
Read 2 more answers
In a well-designed detail report, a field called a(n) ____ field controls the output.
Illusion [34]

Answer:

Control

Explanation:

5 0
2 years ago
Analiza las relaciones y diferencias que encuentras entre las actitudes y los
Anarel [89]

Answer:Technology is the sum of techniques, skills, methods, and processes used in the production of goods or services or in the accomplishment of objectives, such as scientific investigation. Technology can be the knowledge of techniques, processes, and the like, or it ... An articulation of this philosophy could be found explicitly in Vannevar Bush's

4 0
2 years ago
Read 2 more answers
If you have long column labels with columns so wide that they affect the readability of a worksheet, you should first
Anon25 [30]
You can format the columns for a certain width or you can use format cells, word wrap.
3 0
2 years ago
Assume that the reference variable r refers to a serializable object. Write code that serializes the object to the file ObjectDa
laiz [17]

Answer:

FileOutputStream out = new FileOutputStream("ObjectData.dat");

ObjectOutputStream ostream = new ObjectOutputStream(out);

ostream.writeObject(r);

Explanation:

For object serialization, we can use the writeObject method of java.io.ObjectOutputStream class.

The complete code fragment is as follows:

import java.io.*;

class Demo{

      public static void main(String args[]){

             try{

                  r = <Reference to Object to be serialized> ;

                 FileOutputStream out = new FileOutputStream("ObjectData.dat");

                 ObjectOutputStream ostream = new ObjectOutputStream(out);

                  ostream.writeObject(r);

                 ostream.close();

            } catch(Exception e){

                   e.printStackTrace();

            }

      }

}

5 0
2 years ago
Other questions:
  • Rupa would like to quickly insert a table into her document without having to worry about formatting the data in the table. Whic
    5·2 answers
  • QUESTION 2 of 10: New shoes are on SALE. You find a pair you like for $85 dollars. But you only have $45 with you. So, you pay $
    13·1 answer
  • You are a technical consultant for many businesses in your community. One of your clients, a small law firm, has a single Active
    14·1 answer
  • Which security control is most helpful in protecting against eavesdropping on wireless LAN (WLAN) data transmissions that would
    6·1 answer
  • Suppose a host has a 1-MB file that is to be sent to another host. The file takes 1 second of CPU time to compress 50%, or 2 sec
    12·1 answer
  • If the input is negative, make numItemsPointer be null. Otherwise, make numItemsPointer point to numItems and multiply the value
    9·1 answer
  • Nathan would like to save his PowerPoint presentation as a video that can be replayed easily on any device at full quality. Whic
    14·1 answer
  • IDaaS is a ________-based identity and access management offering.
    10·1 answer
  • A company has deployed four 48-port access layer switches to a switch block. For redundancy each access layer switch will connec
    14·1 answer
  • Rideshare companies like Uber or Lyft track the x,y coordinates of drivers and customers on a map. If a customer requests a ride
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!