Consider a Hard Disk with an average seek time of 12ms and rotation speed of 7200rpm,...
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Consider a Hard Disk with an average seek time of 12ms and rotation speed of 7200rpm, and an average number of 500 sectors per track. Assume negligible transfer time. (a) What is the average rotation latency? (b) What is the average time to rotate for 1 sector? (c) Consider the access of 5 sectors. Caculate the time required (ignoring tranfer time, but including rotation time for reading a sector) if (i) The sectors are consecutive in the same track. (ii) The sectors are scattered in various places in the HDD. Consider a Hard Disk with an average seek time of 12ms and rotation speed of 7200rpm, and an average number of 500 sectors per track. Assume negligible transfer time. (a) What is the average rotation latency? (b) What is the average time to rotate for 1 sector? (c) Consider the access of 5 sectors. Caculate the time required (ignoring tranfer time, but including rotation time for reading a sector) if (i) The sectors are consecutive in the same track. (ii) The sectors are scattered in various places in the HDD.
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Related Book For
Database management systems
ISBN: 978-0072465631
3rd edition
Authors: Raghu Ramakrishan, Johannes Gehrke, Scott Selikoff
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