Creating a Scheduled Backup - Differential

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Dear All,

I am attempting to create a scheduled file backup for our office files located on an external drive. I altered the settings so that a differential backup would be created daily at 7:00pm. The computer would then shutdown after the backup was completed.

However, after creating these settings, I am unsure whether I should start the backup process manually, or whether the first scheduled backup will be a full backup if no other backup file is detected as being in existence.

Any assistance would be greatly appreciated.

Regards,

Shahen Davityan

jeu 28/08/2014 - 03:39
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The first backup will be a full backup, by design. Here's some information to help you understand differential and incremental better:

A task for Incremental or Differential will always begin with a full backup. That is necessary, as that becomes the baseline.

For an Incremental task, after the first full backup, subsequent backups will be incremental, each one based on changes since the previous Incremental backup, all the way back to the second backup being incremental based on changes since the full backup. As such, you need all links in the chain, all incremental backups right back to and including the first full backup, in order to Restore.

For a Differential task, after the first full backup, subsequent backups will be differential, each one based on changes since the first full backup. To restore, you would need just any Differential and the Full backup on which it is based.

You should not allow an incremental chain to become too long. An incremental restore depends upon every incremental in the chain being valid, including the original full. It's better to limit each chain to just a few incrementals, followed by a fresh full backup to start a new chain.

You should validate backups periodically. That would alert you much if the full backup were missing or unreadable.

jeu 28/08/2014 - 10:14
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