<HTML ><HEAD ><TITLE >SG_SET_TRANSFORM</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ "><LINK REL="HOME" TITLE="The Linux SCSI Generic (sg) HOWTO" HREF="index.html"><LINK REL="UP" TITLE="Ioctl()s" HREF="ioctl.html"><LINK REL="PREVIOUS" TITLE="SG_SET_TIMEOUT" HREF="s_to.html"><LINK REL="NEXT" TITLE="SG_GET_TRANSFORM" HREF="g_xform.html"></HEAD ><BODY CLASS="SECT1" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >The Linux SCSI Generic (sg) HOWTO</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="s_to.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" >Chapter 8. Ioctl()s</TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="g_xform.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="SECT1" ><H1 CLASS="SECT1" ><A NAME="S_XFORM">8.20. SG_SET_TRANSFORM</H1 ><DIV CLASS="FORMALPARA" ><P ><B >SG_SET_TRANSFORM 0x2204. </B >Only is meaningful when SG_EMULATED host has yielded 1 (i.e. the low-level is the ide-scsi device driver); otherwise an EINVAL error occurs. The default state is to _not_ transform SCSI commands to the corresponding ATAPI commands but pass them straight through as is. [Only certain classes of SCSI commands need to be transformed to their ATAPI equivalents.] The third argument is interpreted as an integer. When it is non-zero then a flag is set inside the ide-scsi driver that transforms subsequent commands sent to this driver. When zero is passed as the 3rd argument to this ioctl then the flag within the ide-scsi driver is cleared and subsequent commands are not transformed. Beware, this state will affect all devices (and hence all related sg file descriptors) associated with this ide-scsi "bus".</P ></DIV ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="s_to.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="g_xform.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >SG_SET_TIMEOUT</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ioctl.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >SG_GET_TRANSFORM</TD ></TR ></TABLE ></DIV ></BODY ></HTML >