For example, from FULL BAKCUP A to FULL BACKUP B, we have a log chain. If you issue a FULL backup C without COPY_ONLY between A and B, then, you break the previous log chain A to B.
Right?
No. You can make as many full backups as you want between full backup A and B, and you will not break the log chain.
According to Microsoft, you should backup log after the Full backup C to establish a new log chain.
Could you please provide the URL to the article? I would like to see the context the recommendation was made in.
Thanks.
SQL BAK Explorer - read SQL Server backup file details without SQL Server.
Supports backup files created with SQL Server 2005 up to SQL Server 2017.