Hi soprom, are you sure you enabled Innodb on mysql before installing zarafa?
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Since version 6.30 you need to enable innodb otherwise the server won't start.
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I have version 6.30-2.16545 running as expected for over two months on sme8b4 and had similar issues when istalling zarafa. See note box just below [[Zarafa#Installation]] on the zarafa contrib page.
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There are posts on the forums covering this issue.