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Operating Systems: Virtualization, Concurrency & Persistence

Case Study: A Simple IDE Disk Driver

Understand how a simple IDE disk driver interfaces with the operating system by studying device registers, command protocols, data transfers, and interrupt handling. This lesson covers the practical workings of disk I/O and driver structure using xv6 as an example.

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To dig a little deeper here, let’s take a quick look at an actual device: an IDE disk driver“AT Attachment Interface for Disk Drives” by Lawrence J. Lamers. Reference number: ANSI X3.221, 1994. Available: ftp://ftp.t10.org/t13/project/d0791r4c-ATA-1.pdf. A rather dry document about device interfaces. Read it at your own peril.. We summarize the protocol as described in ...