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  <sect2 arch="s390"><title>zSeries and System z machine types</title>
<para>

Since &debian; Squeeze, support for booting in ESA/390 mode was dropped.
Your machine needs to support the z/Architecture, 64-bit support is
mandatory.  The userland of the s390 port is still compiled for ESA/390,
though.  All zSeries and System z hardware is fully supported.

&arch-title; support software is included from the kernel 3.1 development
stream.  The most current information about IBM's Linux support can be found at
the
<ulink url="http://www.ibm.com/developerworks/linux/linux390/development_technical.html">
Linux on <trademark class="registered">System z</trademark> page on
developerWorks</ulink>.

</para>
  </sect2>

  <sect2 arch="s390"><title>PAV and HyperPAV</title>
<para>

PAV and HyperPAV are supported transparently, multipathing is not needed to
take advantage of these storage system features.  Be sure to configure the
devices during DASD device selection.  The alias devices will not be
offered neither for formatting, partitioning nor direct use.

</para>
  </sect2>