mirror of https://github.com/tLDP/LDP
152 lines
5.7 KiB
XML
152 lines
5.7 KiB
XML
<chapter id="evmscreateseg"><title>Creating segments</title>
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<para>This chapter discusses when to use segments and how to create them using
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different EVMS interfaces.</para>
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<sect1 id="whyseg"><title>When to create a segment</title>
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<para>A disk can be subdivided into smaller storage objects called disk segments. A segment manager plug-in provides this capability. Another reason for creating disk segments is to maintain compatibility on a dual boot system where the other operating system requires disk partitions. Before creating a disk segment, you must choose a segment manager plug-in to manage the disk and assign
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the segment manager to the disk. An explanation of when and how to assign segment managers can be found in <xref linkend="evmsassignseg"></xref>.</para>
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</sect1>
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<sect1 id="crsegex"><title>Example: create a segment</title>
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<para> This section provides a detailed explanation of how to create a
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segment with EVMS by providing instructions to help you complete the following task:</para>
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<blockquote><example><title>Create a 100MB segment</title>
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<para>Create a 100MB segment from the freespace segment sde_freespace1. This
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freespace segment lies on a drive controlled by the DOS Segment Manager. </para></example></blockquote>
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<sect2 id="guiseg"><title>Using the EVMS GUI</title>
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<para>To create a segment using the GUI, follow the steps below:
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<orderedlist>
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<listitem><para>Select
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<menuchoice>
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<guimenu>Actions</guimenu>
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<guimenuitem>Create</guimenuitem>
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<guimenuitem>Segment</guimenuitem>
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</menuchoice>
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to see a list of segment manager plug-ins.
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</para></listitem>
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<listitem><para>Select
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<guimenuitem>DOS Segment Manager</guimenuitem>.
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Click <guibutton>Next</guibutton>.</para>
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<para>The next dialog window lists
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the free space storage objects suitable for creating
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a new segment.</para></listitem>
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<listitem><para>Select <filename>sde_freespace1</filename>. Click
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<guibutton>Next</guibutton>. </para>
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<para>The last dialog window
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presents the free space object you
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selected as well as the available
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configuration options for that
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object.</para></listitem>
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<listitem><para>Enter 100 MB. Required fields are denoted by the
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"*" in front of the field description. The DOS Segment
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Manager provides default values, but you might want to change
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some of these values.</para>
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<para>After you have filled in
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information for all the required
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fields, the <guibutton>Create</guibutton>
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button becomes available.</para></listitem>
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<listitem><para>Click
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<guibutton>Create</guibutton>.
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A window opens to display the
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outcome.</para>
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</listitem>
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</orderedlist></para>
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<para>Alternatively, you can perform some of the steps to create a segment from the GUI context sensitive menu:</para>
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<orderedlist><listitem><para>From the <guimenuitem>Segments</guimenuitem> tab, right click
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on <filename>sde_freespace1</filename>.</para></listitem>
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<listitem><para>Click <guibutton>Create Segment...</guibutton></para></listitem>
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<listitem><para>Continue beginning with step 4 of the GUI instructions.</para></listitem>
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</orderedlist>
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</sect2>
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<!-- Ncurses-->
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<sect2 id="ncurseg"><title>Using Ncurses</title>
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<para>To create a segment using Ncurses, follow these steps:</para>
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<orderedlist>
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<listitem><para>Select <menuchoice><guimenu>Actions</guimenu><guimenuitem>Create</guimenuitem><guimenuitem>Segment</guimenuitem></menuchoice> to see a list of segment manager plug-ins.</para></listitem>
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<listitem><para>Select <guimenuitem>DOS Segment Manager</guimenuitem>.
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Activate <guibutton>Next</guibutton>.</para>
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<para>The next dialog window
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lists free space
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storage objects suitable for creating
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a new segment. </para></listitem>
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<listitem><para>Select <filename>sde_freespace1</filename>. Activate <keycap>Next</keycap>.</para>
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</listitem>
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<listitem><para>Highlight the <guilabel>size field</guilabel> and press <keycap>spacebar</keycap>.</para></listitem>
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<listitem><para>At the "::" prompt enter <userinput>100MB</userinput>.
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Press <keycap>Enter</keycap>. </para> </listitem>
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<listitem><para>After all required values have been completed, the <guibutton>Create</guibutton>
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button becomes available.</para> </listitem>
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<listitem><para>Activate <guibutton>Create</guibutton>.</para></listitem>
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</orderedlist>
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<para>Alternatively, you can perform some of the steps to create a segment from the
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context sensitive menu:</para>
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<orderedlist>
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<listitem><para>From the Segments view, press <keycap>Enter</keycap> on <filename>sde_freespace1</filename>.</para>
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</listitem>
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<listitem><para>Activate <guimenuitem>Create Segment</guimenuitem>.</para>
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</listitem>
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<listitem><para>Continue beginning with step 4 of the Ncurses instructions.</para>
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</listitem>
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</orderedlist>
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</sect2>
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<!-- CLI-->
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<sect2 id="cliseg"><title>Using the CLI</title>
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<para>To create a data segment from a
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freespace segment, use the
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<command>Create</command> command. The arguments the
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<command>Create</command> command accepts vary
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depending on what is being created. The first
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argument to the <command>Create</command>
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command indicates what is to be created, which
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in the above example is a segment. The
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remaining arguments are the freespace segment
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to allocate from and a list of options to pass
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to the segment manager. The command to
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accomplish this is:</para>
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<programlisting>Create: Segment,sde_freespace1, size=100MB</programlisting>
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<note><title>NOTE</title>
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<para>The <command>Allocate</command> command also works to create a segment. </para></note>
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<para>The previous example accepts the default values for all options you don't specify. To see the options for this command type:<programlisting>query:plugins,plugin=DosSegMgr,list options</programlisting></para>
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</sect2>
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</sect1>
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</chapter>
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