Incremental rotating backups



  • Can I easily do incremental backups to 3 rotating locations with each location getting only files that have changed or are new since the last backup to that location? Then, I’d have multiple backups in case one fails, without backing up duplicate files to the same location, saving time and space. The initial backup to each location is a full backup. I don’t need the backup scheduled. Each backup may be put in new files. Most backups are to USB drives. Or is there different software I should be using for this purpose? I just now registered PA Pro 11.01.02 under Windows XP SP3. Thanks.



  • Rearranging to reply
    @david2:

    The initial backup to each location is a full backup. I don’t need the backup scheduled. Each backup may be put in new files. Most backups are to USB drives.

    So you need three “full” backup scripts - one for each location (the backup wizard makes it easy to create the script) or…
    @david2:

    Each backup may be put in new files. Most backups are to USB drives.

    if the destination is always the same in Windows terminology e.g. Drive “K:”, then one script will do.
    @david2:

    … incremental backups to 3 rotating locations with each location getting only files that have changed or are new since the last backup to that location?

    Another script (again one or three depending on destination) to do “updated”.
    @david2:

    Each backup may be put in new files.

    You can have a “date stamp” added to the backup filename.

    Hope that helps.



  • Some backup software use the file-system archive bit to determine what has been backed up, and they do not compare current and backed up files (ex, time-stamps), so I couldn’t have 3 rotating backups that are each complete backups. How does PA decide what to backup with incremental backups? Does PA consider what is already backed up? Thanks.



  • Depends 😃
    See help file
    @PAHelp:

    “Incremental” - Backups only files that have archive attribute set and after backup resets
    their archive attribute. This mode is suitable for backing up only changed files.
    “Differential” - Backups only files that have archive attribute set but does not reset their
    archive attribute after backup.

    So you could have three scripts
    2 - Differential and the third (last one to run) as Incremental.


 

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