Consider a RAID level 5 organization comprising five disks, with  the parity for sets of four blocks on four disks stored on the fifth disk. How many blocks  are accessed in order to perform the following? a. A write of one block of data b. A write of seven continuous blocks of data

Q: Why parity disk is considered to be the bottleneck? a). All writes involve a read and write to the…

A: Parity disk:  Parity disk array has only one parity disk, which must be updated on all write…

Q: 01 Contider a disk pack with 16 srfaces, 12 tracks per surface and 256 soctors per track 312 bytes…

A: Given : Number of surfaces = 16 Tracks per surface  = 128 Sectors per track = 256  Storage of each…

Q: What is the average time to read or write a 512-byte sector for a typical disk rotating at 15,000…

A: In this question we have been given some information related to computer disk and we need to…

Q: What is the average time to read or write a 512-byte sector for a typical disk rotating at 15,000…

A: ANSWER:-

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 accessing a word from one disk memory: one Seek time and one average rotational delay are…

A: Disk rotates at speed of 500 rotation per sec.  That is,  1 sec - 500 rotation x sec - 1 rotation…

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: Q2:- Suppose there are 100 tracks in a particular disk, explain:T If the read/write head is…

A: In FCFS algorithm, the requests are served in the order of arrival. The track head moves to the…

Q: Let us consider a scenario in which the boot record of a disc volume is corrupted. Which file…

A: Corrupted boot records on disc volumes can cause serious problems with accessing the data that is…

Q: What is the average time to read or write a 512-byte sector for a typical disk rotating at 15,000…

A: Given that, The advertised average seek time = 4 ms The transfer rate =100 MB/sec The controller…

Q: There are many parameters that could be used to describe disk performance;   Which of the…

A: INTRODUCTION: The amount of time that must elapse before the event may take place. a hard disc…

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: onsider a disk with the following characteristics

A: The question is asking for the capacity of a track and the capacity of the disk based on given…

Q: nsider the following scenario: ere are outstanding I/0 requests for blocks on the following…

A: In SCAN algorithm, all the request will be satisfied which are in direction of movement of head.…

Q: These cylinder requests come in to a disk driver. The disk driver code can only buffer five requests…

A: A disk driving force can be defined in such a way that it is a device or software that permits your…

Q: 50à 55à 65à 37à 19à 11à 100à 150     50à 55à 65à 100à150à 37à 19à11     50à 55à 65à 100à150à 37à…

A: Initially at track 50. Nearest track is 55. Then nearest track is 65. after that nearest track is…

Q: Consider a disk with following specifications: 20 surface, 1000 tracks/surface, 16 sectors/track,…

A: According to the information given:- We have to follow the instruction in order to get data transfer…

Q: What is the average time to read or write a 512-byte sector for a typical disk rotating at 15,000…

A: Given: Average seek time= 4 ms= 4 ms Disk rotation= 15000 RPM= 15000 RPM Data rate= 100 MB/Sec =…

Q: Q. Refer Figure 6.7 of your book where data mapping for a RAID Level 0 array is shown. Following the…

A: Here is the solution of the given problem:  I would like to map this like, 0%4 = 0: That is mapping…

Q: To access data in a hard disk, it requires the time to move the head to A. TASK: the desired track…

A: Data :-  5400 RPM  3 ms avg. Seek time  100 MB/ s transfer rate = 100000 kb/s 0.2 ms controller…

Q: What is the average time to read or write a 512-byte sector for a typical disk rotating at 15,000…

A: The question is solved in step2

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: The average time necessary for the correct sector of a disk to arrive at the read write head A…

A: The correct answer for  the above question is:-

Q: Consider a disk that has 15 data blocks starting from block 20 through 34. We are given the FAT…

A: Step 1: Step 2: Step 3: Step 4:.

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

A:

Q: Consider a single-platter disk with the following parameters: rotation speed:7200 rpm; number of…

A: Given data in the question: Rotation speed = 7200 rpm the number of tracks on the one side of the…

Q: Consider a single-platter disk with the following parameters: rotation speed:7200 rpm; number of…

A: Given Data : - Rotation Speed = 7200 rpm No. of tracks on one side of platter = 30000 No. of…

Q: A file system uses X-KB disk blocks. There are a total of 2^10 files on this system. We use bitmap…

A:

Q: For the following buffer pool, using the LRU replacement heuristic, show the disk block ID of the…

A: According to the information given:- We have to following buffer pool, using the LRU replacement…

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: Refer Figure 6.7 of your book where data mapping for a RAID Level 0 array is shown. Following the…

A: I would like to map this like, 0%4 = 0: That is mapping strip with remainder 0 to the disk 0 1%4 =…

Q: Consider a disk with the following characteristics: block size 512 bytes, number of blocks per…

A: First of all let's see the given values: Block size : 512 Bytes Number of blocks per track : 20…

Q: Consider a Disk 1/O transfer, in which 1500 bytes are to be transferred, but number of bytes on a…

A: Given No.of bytes to be transferred (b)=1500 bytes  Rotation speed (r)=1500 Number of bytes on track…

Q: 1. Raid Consider two implementations. Implementation A uses Raid Level 1 and B uses Raid Level 5. B…

A: We need minimum of twice the disk space for implementing RAID level 1. So, 4 Terabytes of disk space…

Q: Consider a disk with the following characteristics: block size 512 bytes, number of blocks per…

A: (i) Disk rotates at 2400 revolutions per min. i.e. 2400 revolution take = 1 min 1 revolution takes =…

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.