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A: Describe the function of the following: Boot control block Volume control block File control block

A: Describe the function of the following: Boot control block Volume control block File control block

Database System Concepts
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
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A: Describe the function of the following: Boot control block Volume control block File control block Directory Structure B: Directories are where pointers to the file's (including other directories) location and information are stored. There are three broad categories for managing directory information and Allocation: Linked, Index, Multilevel Index and Combined scheme. What impact does each method have to drive access efficiency and reliability of storage and capacity of directory structure? C: What difference does Polling vs. interrupt driven I/O in terms of CPU efficiency, data reliability and complexity? D: Define register/memory-mapped I/O (Programmed I/O) vs. interrupt driven I/O and Direct Memory access (DMA) and how do they differ? E: For the following sequence draw a scheduling graph (see Figure 10.4 for an example) using FCFS, SSTF, SCAN and C-LOOK? The tracks range from [0-50]. The hard drive is rotating/parked at track 20. Any SCAN/LOOK is traversing from spinward (track 50) to spindleward (track 0) [in other words the head will begin moving from right to left at the start of this queue]. 0, 1, 17, 3, 40, 43, 2, 44, 3, 45, 30, 15, 35, 5 F: What purpose does RAID0, RAID1 and RAID 2 serve?
Transcribed Image Text:A: Describe the function of the following: Boot control block Volume control block File control block Directory Structure B: Directories are where pointers to the file's (including other directories) location and information are stored. There are three broad categories for managing directory information and Allocation: Linked, Index, Multilevel Index and Combined scheme. What impact does each method have to drive access efficiency and reliability of storage and capacity of directory structure? C: What difference does Polling vs. interrupt driven I/O in terms of CPU efficiency, data reliability and complexity? D: Define register/memory-mapped I/O (Programmed I/O) vs. interrupt driven I/O and Direct Memory access (DMA) and how do they differ? E: For the following sequence draw a scheduling graph (see Figure 10.4 for an example) using FCFS, SSTF, SCAN and C-LOOK? The tracks range from [0-50]. The hard drive is rotating/parked at track 20. Any SCAN/LOOK is traversing from spinward (track 50) to spindleward (track 0) [in other words the head will begin moving from right to left at the start of this queue]. 0, 1, 17, 3, 40, 43, 2, 44, 3, 45, 30, 15, 35, 5 F: What purpose does RAID0, RAID1 and RAID 2 serve?
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