Seperate off-site backup - w/o affecting scheduled backup

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I regularly run a separate full backup to an external drive that I keep at the office. The thing I always wondered is if this affected my regular full/incremental scheduled backups.

Long ago backup programs allowed you to perform a backup without disturbing the 'archive' bit that denoted a file had recently changed.

I have no idea how TIH determines if a file has changed.

So, I'm thinking when I do my 'extra' backup that the next incremental isn't what it would have been had I not done the extra backup.

I forget the option and don't know if it still exists, but there is/was an option to create another backup in a separate location - a setting in the backup job I think. I saw no use for this because when full backups run is determined by TIH and how many incrementals exist. Even if I tried to predict when they would run, I'd not likely have the time to run the extra backup on that date. So, I'd still be in the situation where I wanted just to clone my disk but not disturb the scheduled backups.

Mar, 08/09/2011 - 01:39
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mvp

ATI doesn't use the archive bit. Each backup task is independent from the other. If you are using separate disks, simply set up one taks for each disk. Assign different drive letters to each disk using the Windows Disk management console.

Mar, 08/09/2011 - 02:50
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truwrikodrorowrelupicugojestutroclulachosaswunuhospikigawakijosaswenomaruclojeueclikaspedrubewidebrisubrohutrurifruuagothunugekedrumucisiuobrobrecrupeslapuswosluprothethibakaslechurathikucli
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Here's the scenario I was trying to convey.

Let's say I have a daily task that runs a FULL followed by 5 incrementals before starting over.

Monday morning happens to be the day it does a FULL backup.

Monday evening I install the 18 items from Windows Update. Still Monday evening, after the Windows Updates are installed, I run the separate backup task that creates only a FULL on the external drive I keep off-site.

Tuesday morning, the daily task kicks in on schedule. Does it backup all the changes that were part of the 18 items in the Windows Update???

My inclination is NO. Because I ran a full backup (to that off-site drive) right after the updates were installed.

Is there a white paper somewhere that describes how TIH determines what gets pulled into an incremental? Maybe it scans all the prior backups and uses that as a guide. I'm just looking for a definitive answer so I can believe in it and be comfortable with it.

Sab, 08/13/2011 - 01:19
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It will still back up the 18 items from Windows Update. The task backup will include all the changes detected since the previous backup in the task/chain.

You could easily test this by creating a new text file, running a new Full to the alternate location, and then running another backup on the task. The new text file would be in both backups. If you didn't want to mess with the existing partitions/tasks, you could test using a small partition and a new task.

You may be able to determine the results for sure by looking at your existing backups. Perhaps you can easily tell with certain files you added/created at certain times.

You are correct in wanting to feel comfortable with the backups you create -- you want them to be there for you if you need them.

Dom, 08/14/2011 - 06:39