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I have reasonably good search around this forum to see what things could possibly go wrong when upgrading from 3.1.4 to 4.0.x, and apart from a few horror stories, generally it seems OK.
Does anyone have any advice as to what I might come up against? Is it better to upgrade from 3.1.4 -> 4.0.2 or 4.0.3 first, and then to 4.0.4, or should it work going straight from 3.1.4 -> 4.0.4 directly?
Well, as you've already seen, it generally goes OK. Make sure you have a backup of your Zimbra directory and a copy of the same zimbra version that you've already got installed, just in case you need to reinstall it and restore the system. It may take a while to do the update as there are some schema changes but it should be fairly painless.
Well, as you've already seen, it generally goes OK. Make sure you have a backup of your Zimbra directory and a copy of the same zimbra version that you've already got installed, just in case you need to reinstall it and restore the system. It may take a while to do the update as there are some schema changes but it should be fairly painless.
That's good... just the normal precautions you would make before upgrading then? I'll plan to do it next week. Thanks for the help Bill.
No, I've only got about thirty users and my server is RAID 1+0 anyway so that should be OK. One question I've always wanted to ask is about the 'zcs' directory created when you untar the Zimbra archive file... do you need to delete the directory before you upgrade? When upgrading between 3.1 versions I haven't bothered and just decompressed the file over the exiting files, but some people say they have problems... just interested if it matters at all?
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Upgrading from 3.14 to 4.0.x CentOS4.3 
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