<title>Swap on a New Hard Drive</title>

      <title>Swap on a New or Existing Hard Drive</title>

      <para>The best way to add swap, of course, is to use this as an

      <para>The best way, and the way that gives most performance, is to add

	excuse to add another hard drive.  You can always use another

	a new swap partition on an existing or new hard drive.  How to set up

	hard drive, after all.  If you can do this, go reread the

	partitions and harddrives is explaned in <xref linkend="disks-adding">

	discussion of swap space

	and <xref linkend="configtuning-initial"> contains a discussion on

	in <xref linkend="configtuning-initial">

	partition layouts and swap partition size considerations.</para>

	of the Handbook for some suggestions on how to best

      <para>When a partition is prepared and selected, &man.swapon.8; is used

	arrange your swap.</para>

	to add the partition to the system.  If the partition is

	<filename>/dev/ada1s1p2</filename>, this will look like:</para>

      <screen>&prompt.root; <userinput>swapon

	<replaceable>/dev/ada1s1p2</replaceable></userinput></screen>

      <warning>

	<para>It is posible to use any partition not currently mounted, even

	  if it contains a file system.  If the partition contains a file

	  system and is mounted as swap space, the filesystem will be

	  destroyed.  Therefore, make sure that the partition to be added as

	  swap partition is really the intended partition, before running

	  <command>swapon</command>.</para>

      </warning>

      <para>To make this new swap partition automatically added on boot,

	change <filename>/etc/fstab</filename> to include an entry for the

	partition.  This entry can look something like:</para>

      <programlistning>/dev/ada1s1p1	none	swap	sw	0	0</programlistning>

      <para>For an explanation of entries in <filename>/etc/fstab</filename>,

	refer to &man.fstab.5;.</para>