Comptia A+ Core 1 Exam: Guide To Computing Infrastructure (mindtap Course List)
10th Edition
ISBN: 9780357108376
Author: Jean Andrews, Joy Dark, Jill West
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Expert Solution & Answer
Chapter 5, Problem 8TC
Explanation of Solution
Given: A DVD that has a size of 4.7 GB as marketed by the manufactures, whereas, in explorer, the size is displayed as 4.3 GB.
To find: The reason why manufacturer’s advertisement of the size of the DVD is different than displayed in the explorer...
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
5.Find out how many parts are there in a floppy disk? Suppose a 3.5 inches floppy disk contained 80 tracks, each of which is divided into sectors capable of holding 512 characters. How many characters will the disk hold if each track is divided into 9 sectors? What if each track contains 18 sectors? How does these capacities compare to the size of 400-page novel in which each page contains 3500 characters?
Explain how a DVD manufacturer can advertise that a DVD can hold 4.7 GB, but Explorer reports theDVD capacity as 4,706,074,624 bytes or 4.38 GB.a. Manufacturers are allowed to overadvertise their products.b. The manufacturer measures capacity in decimal and the OS measures capacity in binary.c. The actual capacity is 4.7 GB, but the OS requires overhead to manage the DVD and the overheadis not included in the reported DVD capacity.d. The DVD was formatted to have a capacity of 4.38 GB, but it could have been formatted to have acapacity of 4.7 GB.
A certain moving arm disk storage, with one head, has the following specifications.
Number of tracks/recording surface = 200
Disk rotation speed = 2400 rpm
Track storage capacity = 62,500 bits
The average latency of this device is P msec and the data transfer rate is Q bits/sec.
Write the value of P and Q.
Chapter 5 Solutions
Comptia A+ Core 1 Exam: Guide To Computing Infrastructure (mindtap Course List)
Knowledge Booster
Similar questions
- Consider a disk with a sector size of 512 bytes, 2000 tracks per surface, 50 sectors per track, five double- sided platters, and average seek time of 10 msec. 1. What is the capacity of a track in bytes? What is the capacity of each surface? What is the capacity of the disk? 2. How many cylinders does the disk have? 3. Give examples of valid block sizes. Is 256 bytes a valid block size? 2048? 51200arrow_forwardSuppose you have a 100GB database housed on a disk array that supports a transfer rate of 60MBps and a tape drive that supports 200GB cartridges with a transfer rate of 80MBps. How long will it take to back up the database? What is the transfer time if 2:1 compression is possible?arrow_forwardA manufacturer wishes to design an array of hard disks in a server a capacity of 512gb or more. If the technology used to manufacture the disk allows 2048-byte sectors, 4096 sectors/track and 8192 tracks/platter. How many disks are required, assuming two platters/disk?arrow_forward
- In our discussion of the physical aspects of disk performance, we stated that replacing 7,200rpm disks with 10,000rpm disks can bring a 10% to 50% performance improvement. Why would an improvement of only 10% occur? Could it be that no improvement at all would occur? Explain. (Hint: Rotational latency is not the only determining factor of disk performance.)arrow_forwardConsider a Disk I/O transfer, in which 1500 bytes are to be transferred, but number of bytes on a track is 1000, and rotation speed of disk is 1500 rps but the average time required to move the disk arm to the required track is 15 ms, then what will be total access time?arrow_forwardGiven the following characteristics for a magnetic tape using linear recording described in device management chapter: Density = 1600 bpi (bytes per inch) Speed = 1500 inches/second Size = 2400 feet Start/stop time = 4 ms Number of records to be stored = 200,000 records Size of each record = 160 bytes Block size = 10 logical records IBG = 0.5 inch Find the following: 17.1 Number of blocks needed. 17.2 Size of the block in bytes.arrow_forward
- Consider a disk pack with 16 surfaces, 128 tracks per surface and 256 sectors per track. 512 bytes of data are stored in a bit serial manner in a sector. The capacity of the disk pack and the number of bits required to specify a particular sector in the disk.?arrow_forwardPlease write in complete sentences How many platters are required for a 60GB disk if there are 512 bytes/sector, 1024 sectors per track and 3072 tracks per platter?arrow_forwardThe terms "digital memory" and "storage device" are often used interchangeably. To what extent would it benefit consumers if there were a single memory standard, similar to how there is just one standard for SSD sizes? Can customers save money and time by adopting a single standard? There are two methods for accessing memory: sequential and direct. For what reason are more and more essential devices adopting direct access? How can we move information from a sequential-access device to a direct-access device?arrow_forward
- Consider a disk pack with 16 surfaces, 128 tracks per surface and 256 sectors per track. 512 bytes of data are stored in a bit serial manner in a sector. Calculate the capacity of the disk pack and the number of bits required to specify a particular sector in the disk.arrow_forwardIf the radius of a CD-ROM is 6 cm, what is the average number of bits per cm2 if the total number of bits stored is 6 billion (6 x 109) bits?arrow_forwardWhat is the capacity of a disk with 2 platters, 10,000 cylinders,an average of 400 sectors per track, and 512 bytes per sector?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
A+ Guide To It Technical SupportComputer ScienceISBN:9780357108291Author:ANDREWS, Jean.Publisher:Cengage,
Principles of Information Systems (MindTap Course...Computer ScienceISBN:9781305971776Author:Ralph Stair, George ReynoldsPublisher:Cengage Learning
A+ Guide To It Technical Support
Computer Science
ISBN:9780357108291
Author:ANDREWS, Jean.
Publisher:Cengage,
Principles of Information Systems (MindTap Course...
Computer Science
ISBN:9781305971776
Author:Ralph Stair, George Reynolds
Publisher:Cengage Learning