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[phoenix]

I really don't want to do this but.........1 thing that would sway me is, if i do this (change the filesystem) will we see a "performance" increase?

You don't have to move to ext3, it's only a recommendation and as with most recommendations you can chose to ignore it. Performance would be difficult to quantify, you'd have to run tests in your specific environment and with both filesystems. Whether you move to ext3, or not, just make sure you have a good backup.

[phoenix]

I really don't want to do this but.........1 thing that would sway me is, if i do this (change the filesystem) will we see a "performance" increase?

For a non-Zimbra view on ReiserFS you might like to review this article.