Attachment 87986 Details for Bug 124716 – geom.txt.diff.txt

geom.txt.diff.txt

geom.txt.diff.txt (text/plain; charset=UTF-8), 3.43 KB, created by Hywel Mallett on 2008-06-18 15:27:35 UTC

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Creator: Hywel Mallett

Created: 2008-06-18 15:27:35 UTC

Size: 3.43 KB

patch

obsolete

>--- chapter.sgml        2008-06-18 15:23:31.000000000 +0100
>+++ chapter.sgml.new    2008-06-18 15:23:52.000000000 +0100
>@@ -239,11 +239,77 @@
>       interruption, and even be physically stored in a data
>       safe.</para>
>
>+    <procedure>
>+      <title>Creating a mirror of unformatted ATA disks</title>
>+
>+      <step><para>Load the <filename>geom_mirror</filename>
>+        module:</para>
>+
>+    <screen>&prompt.root; <userinput>kldload geom_mirror</userinput></screen>
>+       </step>
>+
>+      <step><para>Ensure that a suitable mount point exists, such as <filename
>+        role="directory">/mnt</filename>:</para>
>+
>+        <screen>&prompt.root; <userinput>mkdir /mnt</userinput></screen>
>+      </step>
>+
>+      <step><para>Determine the device names for the disks which will
>+        be mirrored, and create the new mirror device.  For example,
>+       to mirror two unused and unpartitioned <acronym>ATA</acronym> disks,
>+       for example <filename>/dev/ad2</filename> and
>+       <filename>/dev/ad3</filename>:</para>
>+
>+        <screen>&prompt.root; <userinput>gmirror label -vb round-robin gm0 /dev/ad2 /dev/ad3</userinput></screen>
>+
>+
>+      </step>
>+
>+      <step><para>Write a standard label, also known as a partition
>+        table, on the new volume:</para>
>+
>+        <screen>&prompt.root; <userinput>bsdlabel -w /dev/mirror/gm0</userinput></screen>
>+
>+      </step>
>+
>+      <step><para>This process should have created two other devices
>+        in the <filename role="directory">/dev/mirror</filename>
>+        directory in addition to the <devicename>gm0</devicename> device.
>+        Those include <devicename>gm0a</devicename> and
>+        <devicename>gm0c</devicename>.  At this point a file system may be created
>+        on the <devicename>gm0a</devicename> device with the
>+        <command>newfs</command> utility:</para>
>+
>+      <screen>&prompt.root; <userinput>newfs -U /dev/mirror/gm0a</userinput></screen>
>+
>+      <para>Many numbers will glide across the screen, and after a few
>+        seconds, the process will be complete.  The volume has been
>+        created and is ready to be mounted.</para>
>+    </step>
>+  </procedure>
>+
>+  <para>To manually mount the created disk stripe:</para>
>+
>+  <screen>&prompt.root; <userinput>mount /dev/mirror/gm0a /mnt</userinput></screen>
>+
>+  <para>To mount this striped file system automatically during the boot
>+    process, place the volume information in
>+    <filename>/etc/fstab</filename> file:</para>
>+
>+  <screen>&prompt.root; <userinput>echo "/dev/mirror/gm0a /mnt ufs rw 2 2" \</userinput>
>+    <userinput>&gt;&gt; /etc/fstab</userinput></screen>
>+
>+    <para>To use gmirror on a root partition, more steps are required for setup</para>
>+
>     <para>To begin, ensure the system has two disk drives of equal size,
>       this exercise assumes they are direct access (&man.da.4;)
>       <acronym>SCSI</acronym> disks.</para>
>-
>-    <para>Begin by installing &os; on the first disk with only two
>+
>+   <para>Begin by installing &os; on the first disk with only two
>       partitions.  One should be a swap partition, double the
>       <acronym>RAM</acronym> size and all remaining space devoted to
>       the root (<filename role="directory">/</filename>) file system.

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