1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>Chapter 2. SCSI upper layer</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="SCSI Interfaces Guide"><link rel="up" href="index.html" title="SCSI Interfaces Guide"><link rel="prev" href="subsystem_design.html" title="Design of the Linux SCSI subsystem"><link rel="next" href="sr.html" title="sr (SCSI CD-ROM)"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Chapter 2. SCSI upper layer</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="subsystem_design.html">Prev</a> </td><th width="60%" align="center"> </th><td width="20%" align="right"> <a accesskey="n" href="sr.html">Next</a></td></tr></table><hr></div><div class="chapter"><div class="titlepage"><div><div><h1 class="title"><a name="upper_layer"></a>Chapter 2. SCSI upper layer</h1></div></div></div><div class="toc"><p><b>Table of Contents</b></p><dl class="toc"><dt><span class="sect1"><a href="upper_layer.html#sd">sd (SCSI Disk)</a></span></dt><dt><span class="sect1"><a href="sr.html">sr (SCSI CD-ROM)</a></span></dt><dt><span class="sect1"><a href="st.html">st (SCSI Tape)</a></span></dt><dt><span class="sect1"><a href="sg.html">sg (SCSI Generic)</a></span></dt><dt><span class="sect1"><a href="ch.html">ch (SCSI Media Changer)</a></span></dt></dl></div><p> 2 The upper layer supports the user-kernel interface by providing 3 device nodes. 4 </p><div class="sect1"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="sd"></a>sd (SCSI Disk)</h2></div></div></div><p>sd (sd_mod.o)</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="subsystem_design.html">Prev</a> </td><td width="20%" align="center"> </td><td width="40%" align="right"> <a accesskey="n" href="sr.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Design of the Linux SCSI subsystem </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> sr (SCSI CD-ROM)</td></tr></table></div></body></html> 5