It took me some time to realize that this was the solution for my RAID
preseed problem as well:
Bug #591909
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partman-auto creates faulty partition table on netboot with preseed
https://bugs.launchpad.net/bugs/574232
You received this bug notification because you are a member of Ubuntu
Bugs,
Probably related to Bug #561573 and Bug #551965
Appending partman/alignment=cylinder as kernel boot parameter solved the
problem for me.
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partman-auto creates faulty partition table on netboot with preseed
https://bugs.launchpad.net/bugs/574232
You received this bug notification because you
** Attachment added: /var/log/partman
http://launchpadlibrarian.net/47475881/partman.log
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partman-auto creates faulty partition table on netboot with preseed
https://bugs.launchpad.net/bugs/574232
You received this bug notification because you are a member of Ubuntu
Bugs, which is
/var/log/syslog of one of the installer runs.
** Attachment added: /var/log/syslog
http://launchpadlibrarian.net/47475967/syslog
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partman-auto creates faulty partition table on netboot with preseed
https://bugs.launchpad.net/bugs/574232
You received this bug notification because you are a
