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Chapter 14 - Implementations of file operations. This chapter discusses the physical organization used in file systems. It starts with an overview of I/O devices and their characteristics, and discusses different RAID organizations that provide high reliability, fast access, and high data transfer rates. The arrangements used to implement device-level I/O are then discussed, including use of buffers and caches to speed up I/O operations and use of disk scheduling policies to improve throughput of disk devices. | Chapter 14 Implementations of File Operations Copyright © 2008 Operating Systems, by Dhananjay Dhamdhere Introduction Layers of the Input-Output Control System Overview of I/O Organization I/O Devices Device-Level I/O The Physical IOCS Device Drivers Disk Scheduling 14. Operating Systems, by Dhananjay Dhamdhere Copyright © 2008 Operating Systems, by Dhananjay Dhamdhere Introduction (continued) Buffering of Records Blocking of Records Access Methods Disk and File Caches Unified Disk Cache Case Studies 14. Operating Systems, by Dhananjay Dhamdhere Copyright © 2008 Operating Systems, by Dhananjay Dhamdhere Layers of the Input-Output Control System Input-output control system (IOCS) holds some file data in memory to provide efficient file processing and high device throughput 14. Operating Systems, by Dhananjay Dhamdhere Copyright © 2008 Operating Systems, by Dhananjay Dhamdhere Layers of the Input-Output Control System (continued) Two layers: Access method .
