To use Truncate or not........

If you use truncate (with DBCC SHRINKFILE or with BACKUP LOG dbname WITH TRUNCATE_ONLY), you 'break' the backup chain and must start a new chain. That means that you must do a Full backup after you issue the truncate command. Truncate means that log and any after it cannot be applied to the FULL backup done before the truncate.

I have used truncate at times.....but I always do a full backup right after it.

-SQLBill