Release note added:
== Partition alignment changes may break some systems ==
By default, Ubuntu 10.04 LTS aligns partitions on disk to 1 MiB (1048576
bytes) boundaries. This ensures maximum performance on many modern
disks, particularly solid state drives but also new "Advanced Format"
disks with physical sectors larger than the traditional 512 bytes. Very
few systems nowadays need the old alignment, used in the days of MS-DOS
when it was useful for partitions to start at the beginning of a
cylinder.
In some rare cases, optimal alignment may cause problems. Some BIOS
implementations (those on Asus P5P800-MX and Asus P5GZ-MX motherboards)
have been reported to hang after installation. It may be difficult to
install Microsoft Windows XP and older after installing Ubuntu, although
more recent versions of Windows should be compatible with optimal
alignment and indeed may produce it themselves. If you find that you
need to use the old cylinder alignment instead, then add the
{{{partman/alignment=cylinder}}} boot parameter when starting the
installer.
** Changed in: ubuntu-release-notes
Status: New => Fix Released
** Changed in: ubuntu-release-notes
Assignee: (unassigned) => Colin Watson (cjwatson)
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BIOS hang - Unable to boot after installation
https://bugs.launchpad.net/bugs/551965
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