Write a short note on disk scheduling, Operating System

Assignment Help:

Write a short note on disk scheduling

 

One of the responsibities of operating system O/S is to use the hardware efficiently. Whenever a process requires I/O to or from the disc it issues a system call to the operating system. The request state severer pieces of information:

  • Whether this operation is input or output
  • What the disk address for the transfer is
  • What the memory address for the transfer is
  • What the number of bytes to be transferred is

                 If the disk controller and drive are available the request can be serviced immediately. If the controller or drive is busy any new request for service will be placed on the queue of pending request for that drive. For a multiprogramming system with several processes the disk queue may often have several pending requests. Therefore when request is accomplish the operating system chooses which pending request to service next.

 


Related Discussions:- Write a short note on disk scheduling

Explain kernel-level threads (klt), KERNEL-LEVEL THREADS (KLT) In this...

KERNEL-LEVEL THREADS (KLT) In this level every thread management is done by kernel .No thread library except an API system calls to the kernel thread facility exists. The kern

Explaintable management techniques, Discuss in detail Table management Tech...

Discuss in detail Table management Techniques?     An Assembler employs the subsequent tables: OPTAB: Operation Code Table consists of mnemonic operation code and its machi

Determine a policy that is not valid page replacement policy, Determine a p...

Determine a policy that is not a valid page replacement policy?  RU policy (Recurrently used) is not a valid page replacement policy.

Batch system, what is a batch system give me answer in simple words so that...

what is a batch system give me answer in simple words so that i can understand

Information system can be divided into three task areas, From hardware pers...

From hardware perspective, every information system can be divided into three task areas Presentation, Application Logic and Data Storage. The R/3 Basis software is extremely s

Factors involved in choosing the host operating system, 1. How is reliabili...

1. How is reliability enhanced with the microkernel approach to system design?  2. In a virtual machine design where guest operating systems are independent virtual machines sup

Explain the steps in deadlock recovery, Explain the steps in deadlock recov...

Explain the steps in deadlock recovery. a)      Exterminate off all processes involved - drastic. b)      Exterminate off one at a time till deadlock gone - select a victim.

Process, what common event leads to the creation of a process?

what common event leads to the creation of a process?

Show the services which provided by operating system, Q. Show the services ...

Q. Show the services which provided by operating system? A) Resource Allocation: If there are more than one user or jobs running at the same instance then resource

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd