Answer the following questions. (250 words max/question) 1. What are the main goals of RAID technology? How does it achieve them? 2. How does disk mirroring improve reliability? 3. What techniques are used to improve the performance of disks in RAID? 4. Suppose you use RAID level 0+1 (striping and mirroring) to do blockwise striping over 4 disks, and you have mirrored the data on another 4 disks. Under optimal circumstances (i.e., equal distribution of requests, perfect load balancing), the number of block read accesses allowed by the RAID system would be Explain your answer. a. the same as for a single disk b. two times higher than a single disk c. four times higher than a single disk d. eight times higher than a single disk

Answer the following questions. (250 words max/question) 1. What are the main goals of RAID technology? How does it achieve them? 2. How does disk mirroring improve reliability? 3. What techniques are used to improve the performance of disks in RAID? 4. Suppose you use RAID level 0+1 (striping and mirroring) to do blockwise striping over 4 disks, and you have mirrored the data on another 4 disks. Under optimal circumstances (i.e., equal distribution of requests, perfect load balancing), the number of block read accesses allowed by the RAID system would be Explain your answer. a. the same as for a single disk b. two times higher than a single disk c. four times higher than a single disk d. eight times higher than a single disk

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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