Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Q. More than one disk drive is able to be attached to a SCSI bus. Especially a fast wide SCSI-II bus can be connected to at most 15 disk drives. Remember that this bus has a bandwidth of 20 megabytes per second. At any time merely one packet can be transferred on the bus between some disk's internal cache and the host. Nevertheless a disk can be moving its disk arm while some other disk is transferring a packet on the bus. As well a disk can be transferring data between its magnetic platters and its internal cache while some other disk is transferring a packet on the bus. Considering the transfer rates that you computed for the various workloads in subsequent discuss how many disks can be used effectively by one fast wide SCSI-II bus.
Answer:
For 8 KB random Input/output on a lightly loaded disk where the random access time is computed to be about 13 ms (see subsequent exercise) the effective transfer rate is about 615 MB/s. In this condition 15 disks would have an aggregate transfer rate of less than 10 MB/s which shouldn't saturate the bus. For 64 KB random examine to a lightly loaded disk the transfer rate is about 3.4 MB/s therefore five or fewer disk drives would saturate the bus. For 8 KB reads with a large sufficient queue to reduce the average seek to 3 ms the transfer rate is about 1 MB/s thus the bus bandwidth may be adequate to accommodate 15 disks.
What is the use of inter process communication. Inter process communication gives a mechanism to allow the co-operating process to communicate with each other and synchronies t
what is a batch system give me answer in simple words so that i can understand
Relocation bits employed by relocating loader are specified by Relocation bits employed by relocating loader are specified by Assembler or Translator
When the Page fault frequency in an operating system is reduced Locality of reference is appropriate to the process
Multi-level page tables are tree-like structures to hold page tables. As an example, consider a two- level page table, again on a 32-bit architecture with 212 = 4 kbyte pages. Now,
Explain the Application Interaction Protocols Application interaction protocols are uniquely defined for each program and are used to logically describe the data being passed b
Problem: a) Explain physically what occurs when a disk is fragmented. What is the purpose of "defragmenting" a disk? b) What is the idea behind backing up data on a secondar
Many early operating systems regarded processes as different timesharing users. The process abstraction is a popular way to organize concurrent programs, but it is not the only cho
Explain multilevel feedback queue in detail A process can move among the various queues; aging can be executed this way Multilevel-feedback-queue scheduler explained b
In a multiprogramming and time sharing environment several users share the system simultaneously .what are two such problems?
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!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd