I know this is probably a very basic question, but I am in need to perform this migration on a production server and am very concerned about corrupting or otherwise losing emails. Please help!
I have an extremely outdated Zimbra running on one server:
RHEL4_64 NETWORK edition
what I would like to do is both upgrade to the latest version of Zimbra avialble:
and migrate everything to a new machine running latest redhat and hardware.
To make life easier I have an MX BACKUP service running - allowing me to shutdown my zimbra server for maintenance, and I completely new RHEL5_32 machine with all prerequisites.
First of all can I run full backup on 4.5.5GA and restore on 5.0.5? If not, do you recommend I install older version on new machine, restore, then upgrade?
Second, I assume I have to put the current/live server into maintanance mode to prevent it from getting new emails while I backup & restore? how do I do this?
note: running "zmcontrol maintenance" seems to do nothing. should I just stop MTA? ("zmmtactl stop")?
Anything else I should think about, before performing this upgrade and migration?