<listitem>
<para>
Specifies that a target is preferred, e.g. possible local, faster
- target. Using block=pref on show command will wait for all these
+ target. Using block=preferred on <link linkend="command-show">
+ show command</link> will wait for all these
targets to return records before releasing the block.
- If no target is preferred, the block=pref will identical to block=1,
- which release when one target has returned records.
+ If no target is preferred, the block=preferred will identical to
+ block=1, which release when one target has returned records.
</para>
</listitem>
</varlistentry>