As to avoiding loss of data, the critical point is to make a backup of
your .../owncloud/data directory and of your database. Both are
described in the instructions on how to upgrade, you just have to follow
the corresponding links.
Please also note the sequence of your upgrades: skipping major versions
is not supported and skipping point versions is not a good idea.
> Le 14 sept. 2016 à 18:21, Chris <[hidden email]> a écrit :
> You're currently mixing two different things:
> migration = move the oC installation to a new server
> update = update the oC installation on the same server
I would like to update my owncloud server from owncloud 8 to owncloud 9 without lose my data such as address book contact, calendar event and files
If it's not possible I would just update my owncloud 8 server.