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  • If I use the latest full backup, then do I need to ensure that the log backup that I will apply on top of it covers the time when full backup was taken? So should I use 11pm onwards log backup? Commented Sep 29, 2021 at 11:22
  • No backup are 100% sure... if your last full backup ended up "corrupted" or lost, you usually have the B plan which is to restore the previous full/diff and ALL the log from this backup to the time you want to restore to. Taking a manual log backup and deleting that file will make this B plan not working. Now... Why do you need to do a manual log backup ? why don't you do that backup with your backup tool (presuming the automatic backups are done with a backup tool) Commented Sep 29, 2021 at 12:13
  • @variable in regards to your comment about log backups taken during full backup please read What happens to transaction log backups during full backups? by Erik Darling Commented Sep 29, 2021 at 12:44