A firm that needs fast response times got a proposal for a new system with far more storage than the requirements paper required. When the firm asked about the extra storage, the vendor said he was bidding for a set of the company's smallest disk drives. Why didn't the merchant just sell fewer disks?

A firm that needs fast response times got a proposal for a new system with far more storage than the requirements paper required. When the firm asked about the extra storage, the vendor said he was bidding for a set of the company's smallest disk drives. Why didn't the merchant just sell fewer disks?

Systems Architecture

7th Edition

ISBN:9781305080195

Author:Stephen D. Burd

Publisher:Stephen D. Burd

Chapter12: Secondary Storage Management

Section: Chapter Questions

Problem 12VE

See similar textbooks

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?
Suppose we have a disk drive with the block size B=4096 bytes. An unordered file with fixed-length is created. The record size is R=250 bytes. The number of records is r=400,000 records. How many blocks are needed to store all records?
Some data structures only make use of the outside tracks of magnetic disks, while others completely ignore the inner tracks. The phrase "hot spots" is often used to refer to such arrangements. Why would you want to do that, exactly?
In Feynman's lecture he wondered "why cannot we write the entire 24 volumes of the Encyclopedia Brittanica on the head of a pin". For a modern hard disk drive the area of a single bit of information on the surface of the disk is roughly 10 x 40 nm² in area. In such a hard drive would the area required to store the data for 24 volumes of the Encyclopedia Brittanica be greater or less than the head of a pin? In Feynman's lecture he estimates the 24 million books as big as the Encyclopedia Brittanica has 10¹5 bits of information.
What is non-return-to-zero method and give reason why it avoids writing data to a magnetic disk.
You have a disk with an average seek time of 3ms. Its rotation speed is 20,000rpm. The disk is organized as 512-byte sectors with 500 sectors per track. Assume that the disk uses sequential organization. How long would it take to read a file consisting of 3000 sectors? What is the total size of the file read in MB?
Suppose a Unix Inode has 10 direct disk block pointers, one single indirect block pointer, one double indirect block pointer, and one triple indirect block pointer. For convenience, each index table has 256 = 28 entries and each block has 1K = 210 bytes. What is the maximum size of a Unix file in Kbytes?
Find out disk capacity bytes ?
A student finishes a Ph.D. working on a problem that has aspects that are directly patentable and solve a major problem in the disk drive industry. His new job could be with Hitachi or Seagate, or some similar firm. He arrives at the new job and discovers that the work done as a student, which is in the patent process, will solve the problem at his new company. If he reveals what he knows to his new employer he will be an immediate hero, but will compromise the patent process at his original institution. This step could have important financial implications for the original institution in the form of royalties. What are the relevant ethical considerations in this dilemma? The answer could depend on missing information, such as the nature of the contract signed by the student with his institution, if any, and the nature of its intellectual property rules. This information may have an impact on what the correct ethical response is.
What is the capacity of a disk with 2 platters, 10,000 cylinders,an average of 400 sectors per track, and 512 bytes per sector?
What is the highest percentage of the memory bus capacity that could be consumed by the disk’s DMA if there are 4 disk drives is use?
Operating systems make an effort to store files in chunks that are sequentially ordered on disk. The use of magnetic disks for this task seems unnecessary.If you don't use SSDs, do you believe they're still necessary? Is there a rationale for this phenomenon?