You don't really provide much information, so it's hard to help. I.e., you run db_recover, but from what directory?
In any case, if you are in /opt/zimbra/data/ldap/hdb/db and running that command as the ZIMBRA user and not root, and you're getting that output, then there's really no chance of recovery of the database. I would advise finding a backup. If you never made backups, then you've learned why they are so important.
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