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January 24, 2012

Log Backup Chain

by Scott Newman

If you break your log backup chain by switching a database into simple recovery or by executing BACKUP LOG WITH NO_LOG and WITH TRUNCATE_ONLY, there is a misconception that you then have to do a full backup in order to get your transaction log backups to run again.  This is incorrect.  Once you switch your recovery model back to full you only have to do a differential backup in order to restore the chain.

See Paul Randal’s blog post for more information (and an example script to demonstrate this).

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