For a 5,000 RPM disk, assume its average seek time is 7 msec, and it has 100 MB/sec bandwidth; assume the sector size is 512 bytes. (In this problem, MB means 1,000,000 bytes.) How long does it take to access 2,048 bytes of contiguous data on average? What is the average throughput (bytes per second) if the user accesses 512 bytes for each I/O? Assume the data is perfectly aligned on the disk. How long does it take to access 1 MB of contiguous data (on average)? What is the average throughput (bytes per second) if the user accesses 1 MB for each I/O operations? Assume the data is perfectly aligned on the disk. Suppose a user expects his or her average throughput to reach 50% of the disk’s maximum bandwidth. Find the minimum I/O size needed to achieve this

Q: In our explanation of the physical elements of disk performance, we said that switching from…

A: Performance enhancement One of the most important a features of a CPU is its system performance. It…

Q: Assume that the head of a moving-head disc has 200 tracks numbered 0 to 199 and is currently serving…

A: The FCFS Disk Scheduling Technique is the most basic disc scheduling algorithm, and it works on a…

Q: Suppose that a disk drive rotates at 8000 RPM. It has an average Seek time of 4 milliseconds. If its…

A: Disk drive is a software to read, write or save data in disk memory. It gives memory space to store…

Q: 1. Consider a memory system with a cache access time of 100ns and a memory access time of 1200ns. If…

A: As our guidelines we can author only first question. If you want answer of other questions then…

Q: Problem: Consider a long sequence of accesses to a disk with an average seek time of 6 ms and an…

A: As given:- Problem: Consider a long sequence of accesses to a disk with an average seek time of 6 ms…

Q: Consider a Disk I/O transfer, in which 1500 bytes are to be transferred, but number of bytes on a…

A: Given data: Transferred bytes (b)=1500 bytes  Rotation speed (r)=1500 Number of bytes on track…

Q: For a magnetic disk with concentric circular tracks, the seek latency is not linearly proportional…

A: For a magnetic disk with concentric circular tracks, the seek latency is not linearly proportional…

Q: A computer has instructions that each require two bus cycles, one to fetch the instruc- tion and one…

A:

Q: Compute the Average access time for memory system when the time for Main Memory is 2000 ns, the time…

A: Q: Compute average access time

Q: Compare the bit-map and hole-list methods for keeping track of free space on a disk with 800…

A:

Q: Consider a scenario where the Hard Disk is transferring block-oriented data to the Random Access…

A: Best I/O techniques to support the data transfer operation between HardDisk and RAM

Q: Assume that 1000MB of data needs to be transferred to the hard disk at the rate of 200 MB /sec.…

A: We need to find the total context switch component time for the given scenario.

Q: Last solution had mistakes For a 5,000 RPM disk, assume its average seek time is 7 msec, and it has…

A: We are given average seek time, bandwidth, sector size and 5000 RPM disk. To find out the average…

Q: Consider a disk with a sector size of 512 bytes, 2000 tracks per surface, 50 sectors per track, five…

A: (1) Capacity of track = bytes/sector * sectors/track = 512 * 50 = 25K in bytes i.e. 25K Capacity of…

Q: Given a system with 2 memory channels and 4 DRAM DIMMs (2 DIMMs per channel), each DIMM has: • 1…

A: Addressing in physical and virtual memory spaces refers to the mechanism by which a computer's…

Q: Suppose that we have a byte-addressable computer with 16-bit main memory addresses and 32 blocks of…

A: Introduction: The current computer system's memory hierarchy is a complicated arrangement of caches…

Q: 64. The time which is needed for consecutive blocks transferring is classified as a. rotational…

A: Given that, The time which is needed for consecutive blocks transferring is classified as a.…

Q: In our discussion of the physical aspects of disk performance, we stated that replacing 7,200rpm…

A: Performance improvement System performance is one of the key aspects of a processor. It determines…

Q: Consider a system in which bus cycles takes 500 ns. Transfer of bus control in either direction,…

A: Given Time for Bus cycles = 500 ns Transfer of bus control = 250 ns I/0 device data transfer rate =…

Q: A program repeatedly perform the 3steps process: it reads a 4KB block of data from disk, does some…

A: As program performing a repetitive process involving reading data from disk, processing it, and…

Q: Q: If data is to be sent from an input device to a memory buffer starting at address A000H and…

A: Intro DMA Channels The 8237 has four separate DMA channels each channel with two 16 bit registers…

Q: 6- In 8086Mp bus cycles, the signal (ALE) becomes '1' during clock cycle. 7- The type of the buffer…

A: As per our guidelines we are supposed to answer?️ only one question. Kindly repost other questions…

Q: Consider a system in which bus cycles takes 500 ns. Transfer of bus control in either direction,…

A:

Q: Consider a disk with a sector size of 512 bytes, 2000 tracks per surface, 50 sectors per track, five…

A:

Q: 114. The total transfer time for a disk I/O operation magnetic is equal to 30 msec. Knowing that:…

A: Given: The total transfer time for a disk I/O operation magnetic is equal to 30 msec. The overall…

Q: 2. Suppose that the hard disk on your personal computer rotates at 3000 revolutions a minute, that…

A:

Q: 4. Assume that it takes 100 ns to access memory and when a page number is in TLB, to access a…

A: Answer : Effective memory access time = h (t + m) + (1-h) (t+m+m) h = hit ratio = 95 / 100  t =…

Q: For a 5,000 RPM disk, assume its average seek time is 7 msec, and it has 100 MB/sec bandwidth;…

A: Hello student Greetings Hope you are doing great. Thank You!!!   To answer these questions, we will…

Q: A disk drive has 1000 cylinders, 8 tracks per cylinder, 32 sectors per track, and 512 bytes per…

A: Average time = seek time + average rotational latency+ data transfer time.  Here since data transfer…

Q: Suppose the user process' size is 8192Kb and is a standard hard disk where swapping has a data…

A: Swapping is a memory management scheme in which any process can be temporarily swapped from main…

Q: The outer track 0 of a hard disk has a diameter of 8cm, the innermost track 36113 has a diameter of…

A: We have ,            Outer track '0' of a hard disk has a diameter = 8 cm            Innermost track…

Q: How many platters are required for a 60GB disk if there are 512 bytes/sector, 1024 sectors per track…

A: In order to determine the number of platters required for a 60GB disk, we need to consider the…

Q: Consider a D are to be tra track is 100C rns but the

A:

Q: A computer has instructions that each require two bus cycles, one to fetch the instruc- tion and one…

A: We need to find the slow down or cycle wasted in DMA transfer for the given scenario.

Fundamentals of Input and Output Performance

The I/O subsystem is a component of computer system design that uses buses to assist communication between the Central Processing Unit, Computer Memory/Storage, and Input and Output Devices (that is known as peripheral devices). The I/O subsystem includes disc controllers, tape drives, discs, system buses, and other devices. The I/O database application reads and writes drives using the operating system windows I/O.