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===Notes===
===Notes===
{{Note box|msg=In-place upgrades are not supported. It is necessary to backup and then restore.}}
{{Note box|msg=In-place upgrades to SME 9.x using yum or CD are not supported due to design constraints imposed by CentOS.
It is necessary to backup the old server & then restore to the new server.
The simplest way to do this is via a Console Backup to attached USB disk (on old server).
Then install the SME 9.x OS from CD on the new hardware (on new server).
Then select to do a Restore on first boot of the newly installed SME Server 9 (attach USB when asked on first reboot).
Alternatively use one of the Backup & Restore options available in server manager panel. On the new SME9 server, configure the identical backup job in the server manager Backup or Restore panel, & then select the Restore function within server manager, basic networking configuration of the server will be required if different from original server.
Note that all add on contribs will need to be re-installed on the new SME 9.x server. Contrib data & configuration will be restored, but its usefulness will depend on the contrib design being unchanged between older (el4 or el5) & el6 versions.
Other manual tweaks eg custom templates, will need to be deleted & recreated in line with SME 9.x template code.
Where extensive modifications have been made to the "old eg SME8.1" server, it is recommended to carry out a test backup & restore upgrade first, to discover any problems & ascertain suitable fixes & workarounds. Removing contribs & custom templates before upgrading is recommended.}}
/boot partition is always RAID 1.
/boot partition is always RAID 1.
