I've started upgrading systems from openSUSE 13.1 to 13.2. Virtual machines
without special stuff like mdadm raid devices oder multipathed FC LUN's went
fine.

But systems (IBM HS22 Blades) with mdadm raid devices are booting to emergency
mode. The systems have three raid 1 devices (swap, / and /srv or /home), swap
and / are correctly assembled but the third md device is missing and it also
does not appear in /proc/mdstat. Manually running "mdadm -A --scan" brings it
up and "systemctl default" continues booting. To dig deeper into this issue,
I've installed openSUSE 13.2 from scratch on a spare blade and here md2 is
correctly assembled.

This is the content of /etc/systemd/system/ of the upgraded system:
/etc/systemd/system/dbus-org.opensuse.Network.AUTO4.service
/etc/systemd/system/dbus-org.opensuse.Network.DHCP4.service
/etc/systemd/system/dbus-org.opensuse.Network.DHCP6.service
/etc/systemd/system/dbus-org.opensuse.Network.Nanny.service
/etc/systemd/system/default.target
/etc/systemd/system/default.target.wants/sysstat.service
/etc/systemd/system/default.target.wants/systemd-readahead-collect.service
/etc/systemd/system/default.target.wants/systemd-readahead-replay.service
/etc/systemd/system/getty.target.wants/getty@tty1.service
/etc/systemd/system/multi-user.target.wants/acpid.service
/etc/systemd/system/multi-user.target.wants/apache2.service
/etc/systemd/system/multi-user.target.wants/auditd.service
/etc/systemd/system/multi-user.target.wants/cron.service
/etc/systemd/system/multi-user.target.wants/dsmc.service
/etc/systemd/system/multi-user.target.wants/irqbalance.service
/etc/systemd/system/multi-user.target.wants/mcelog.service
/etc/systemd/system/multi-user.target.wants/ntpd.service
/etc/systemd/system/multi-user.target.wants/postfix.service
/etc/systemd/system/multi-user.target.wants/remote-fs.target
/etc/systemd/system/multi-user.target.wants/smartd.service
/etc/systemd/system/multi-user.target.wants/sshd.service
/etc/systemd/system/multi-user.target.wants/syslog-ng.service
/etc/systemd/system/multi-user.target.wants/wicked.service
/etc/systemd/system/network-online.target.wants/wicked.service
/etc/systemd/system/network.service
/etc/systemd/system/sysinit.target.wants/multipathd.service
/etc/systemd/system/syslog.service
/etc/systemd/system/system-update.target.wants/systemd-readahead-drop.service
/etc/systemd/system/timers.target.wants/logrotate.timer
/etc/systemd/system/wickedd.service.wants/wickedd-auto4.service
/etc/systemd/system/wickedd.service.wants/wickedd-dhcp4.service
/etc/systemd/system/wickedd.service.wants/wickedd-dhcp6.service
/etc/systemd/system/wickedd.service.wants/wickedd-nanny.service
/etc/systemd/system/wicked.service.wants/wickedd.service

I've made the scratch system identical to the problematic system (identical
installed packages, conf files in /etc, active systemd services, and so on) and
it still assembles md2. I've no more ideas where to search for possible causes.
Please let me know what kind of information I should provide in order to help
you to find the cause.