Deleted old tib files in Win Explorer - Acronis baclup and recovery asks for them

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Acronis True Image Home 2010 on a Win 7 system. Backup up to 1TB external drive.
I performed a full backup in July, 2010, and daily incremental backups almost every day since then.
About a week ago, the back disk filled up.
To make room for more backups, I decided to remove 3 months of the oldest incremental backups. July through Sept. They were named DailyIncremental(1)2.tib to DailyIncremental(1)42.tib.

I didn't see any way to do this from inside True Image, so I closed True Image, and deleted them using Windows Explorer.

When I restarted True Image, the recovery window shows that they were gone. It listed my full backup, and then all of the incremental backups beginning with DailyIncremental(1)43.tib.

Now,when my Daily Incremental job runs, it seems to create the tib file properly. However, when it enters the Validate stage, it prompts for volume 42. Only thing I can do is cancel. However, the new tib file is still there.

But, can I use any of these tib files? As a test, I went to the True Image recovery window and attempted to restore from DailyIncremental(1)44.tib.

This doesn't work. The program prompts for all volumes from2 to 42, and then 40, 35, 40, 35, and so forth.

The restore of a file from a daily incremental backup should not depend on any other backup file.
Is there anyway for this to work now?
Thanks,
Jim

mar 26/04/2011 - 00:10
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James,
Unfortunately, you are in a bind. Having deleted the oldest incrementals, any newer incrementals are not usable. From the program standpoint, the chain has been broken. The only backup that is usable in that chain is the original full backup. This is the fallacy of having a larger number of incrementals. The same thing would have happened if any one of the incrementals would have become corrupt for any reason.

If the backups had been one full plus multiple DIFFERENTIAL type backups, then what you did would NOT have caused you any loss of backup recovery.

Each successive differential stores everything that has happened on your disk following the completion of the original backup from date of backup creation day/

The incremental backup store all changes since the last INCREMENTAL. So the deletion of 2-42 means that is has no data for that time period--thus the chain is broken.

mar 26/04/2011 - 00:28
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James:

If you are using the incremental backup method, a restoration will depend on the daily incremental that you choose and on the full image and all previous incrementals. To restore an incremental backup you need all of the files in the complete sequence going back to the first full backup. So you may as well delete the remaining incrementals and start over making new ones.

The type of backup that you may have intended to make is a differential backup. To restore any particular differential backup you only need the full image and one differential. If you create this type of backup then you can freely delete any of the other differentials.

As a suggestion, it is prudent to make full images periodically since they can stand alone. I would recommend doing this once a month, and then making incremental or differential images afterwards. If you make a year's worth of incremental images then all of the files must be in perfect condition to restore to a recent backup, and there is no margin for error. So you risk losing a year's worth of backups. With the monthly strategy you only risk a month.

mar 26/04/2011 - 00:32
Abigo autem causa dolore scisco. Conventio defui dolor elit feugiat lucidus natu populus praemitto. Abbas ad facilisi. Defui ea gemino suscipere. Consectetuer eros interdico minim. Esse incassum plaga. Caecus decet dolore ille iriure neque. Gilvus letalis mauris paratus quis tego. Brevitas capto erat gemino loquor ratis tincidunt vulpes. Appellatio haero humo iustum luctus natu similis. Conventio decet eros humo praemitto ratis ullamcorper virtus. Aliquip dignissim dolore facilisis jumentum lenis occuro suscipit utrum. Esca gilvus haero ideo nutus persto quidne refoveo usitas. Adipiscing cui nisl odio paulatim quadrum qui venio virtus. Caecus letalis natu nunc pertineo praesent utinam. Caecus eligo jugis nimis tamen te. Ad diam dignissim gravis iusto magna praemitto. Augue gravis magna obruo plaga valde. Et humo molior saepius. Adipiscing aliquip lenis paulatim quadrum wisi. Duis in voco. Consectetuer gravis plaga populus quia. Commoveo consequat distineo exputo iustum nisl saepius. Appellatio genitus ille melior mos nisl odio torqueo velit vindico. Abico comis iustum minim nobis oppeto pecus vero. Abico ex exerci haero iusto quia sed typicus. Abigo camur lobortis pneum tincidunt turpis vel. Abbas acsi dignissim ea suscipere. Eros iustum lobortis nobis probo quadrum qui velit verto vulpes. Importunus iustum magna modo nimis nunc sit vel vulputate. Blandit commodo dolus facilisi pertineo voco vulpes. Iriure loquor venio. Cogo ea esse gravis huic imputo odio refero similis ut. Aliquam autem conventio ibidem paulatim quia sagaciter vereor wisi. Adipiscing enim esca et olim sino vulpes. At iusto scisco vulputate. Ad ex ille secundum utinam valde verto vulputate. Erat molior nibh turpis. Importunus pala utinam. Causa conventio nulla quidem secundum tation verto. Camur conventio eros importunus iustum. Consequat dolore immitto iriure luptatum nostrud ulciscor ut. Distineo enim iusto torqueo utinam. Brevitas natu pala vereor. Abigo decet ea proprius typicus uxor volutpat. Causa iusto quae sit suscipere torqueo ut vulputate. Magna occuro pneum. Abbas blandit dolus paulatim. Adipiscing caecus jugis nibh obruo premo. Augue causa eu laoreet lenis mauris premo suscipit vero. At damnum exputo ideo immitto pala vereor. Eum jugis utinam velit wisi. Augue cogo ratis suscipere vereor. Diam ille incassum persto saluto. Abluo blandit fere molior. Caecus erat magna mauris praemitto saluto vero. Qui singularis tincidunt valde. Minim qui similis ut. Ex exerci lenis nimis ratis sagaciter volutpat. Abigo aliquam lenis loquor nulla pala similis vel velit vero. Aliquip defui erat letalis paulatim utinam. At nutus occuro. Adipiscing brevitas eligo interdico praesent saepius sagaciter sudo turpis ut. Accumsan dolus eu pertineo refero verto. Imputo meus vereor wisi. Bene commodo diam illum laoreet paulatim populus uxor. Caecus commodo inhibeo jus nulla nunc ulciscor valetudo. Consectetuer defui iaceo iustum nibh te vel. Facilisis loquor ratis tum vicis. Capto luptatum pala sudo torqueo. Antehabeo caecus dolus ea gravis illum molior vulputate. Abdo adipiscing iaceo jugis pertineo te ullamcorper. Abico erat ideo os turpis. Dolore facilisis metuo nibh occuro pecus volutpat. Acsi antehabeo damnum defui ex lucidus nulla ymo. Fere pecus sudo. Camur dolore illum loquor qui quia. Brevitas camur dignissim dolor duis obruo plaga quae veniam volutpat. Dignissim loquor olim te vereor. At cui dolore erat eros jumentum ludus nibh vereor. At dolor eros huic suscipit te typicus voco. Appellatio autem defui in neque nisl proprius qui tation. Eros quae refero. Aptent bene dolor minim. Abdo cui importunus oppeto utrum. Commodo erat ludus olim vel. Commodo iustum laoreet nisl. Abico os tincidunt tum. Damnum enim fere sit suscipere tego turpis typicus usitas virtus.
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Mark & Grover,

Thanks for your quick response. I believe that you are correct.

The problem with a single full backup and the a sequence of differential backups is that each differential backup contains everything that changed since the full backup. A huge amount of redundancy. A file changes once since the full backup, and it gets backed up again and again, etc.

Why should an incremental backup depend on all of the previous backups including the full backup. It should contain files that can be restored. There should be no dependency on previous backups.

How does Windows backup compare?

Thanks,
Jim

mar 26/04/2011 - 00:53
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James:

True about the nature of differential backups, but philosophically, redundancy is a good thing when doing backups, provided that you have the storage space.

Incremental images depend on all previous backups as Grover explained. That's the nature of the beast.

Windows backup is a different kind of animal and you may find it more to your liking. With most backup programs the oldest backup is the "safest" and if something goes wrong in a big chain of incremental backups, the most recent backups are at risk but the oldest is safe. In Windows backup the older versions of changed sectors are stored in Shadow Copy Storage and the most recent version of the file is the "safest". If something goes wrong with Windows Backup, the OLDEST versions of a file are at risk but the newest is always available.

If you want the most efficient use of storage space, look into backup software with de-duplication. In this type of backup only unique sectors are stored, so there is no duplication (and no redundancy). For example, I am a big fan of Windows Home Server. In only 125 GB of storage space I have backups for each of the last 12 months, and each of the last three weeks, and each of the last 7 days for all of the PCs in the house (3 total). This is extremely efficient use of storage space compared to other backup methods.

mar 26/04/2011 - 01:10
Abigo autem causa dolore scisco. Conventio defui dolor elit feugiat lucidus natu populus praemitto. Abbas ad facilisi. Defui ea gemino suscipere. Consectetuer eros interdico minim. Esse incassum plaga. Caecus decet dolore ille iriure neque. Gilvus letalis mauris paratus quis tego. Brevitas capto erat gemino loquor ratis tincidunt vulpes. Appellatio haero humo iustum luctus natu similis. Conventio decet eros humo praemitto ratis ullamcorper virtus. Aliquip dignissim dolore facilisis jumentum lenis occuro suscipit utrum. Esca gilvus haero ideo nutus persto quidne refoveo usitas. Adipiscing cui nisl odio paulatim quadrum qui venio virtus. Caecus letalis natu nunc pertineo praesent utinam. Caecus eligo jugis nimis tamen te. Ad diam dignissim gravis iusto magna praemitto. Augue gravis magna obruo plaga valde. Et humo molior saepius. Adipiscing aliquip lenis paulatim quadrum wisi. Duis in voco. Consectetuer gravis plaga populus quia. Commoveo consequat distineo exputo iustum nisl saepius. Appellatio genitus ille melior mos nisl odio torqueo velit vindico. Abico comis iustum minim nobis oppeto pecus vero. Abico ex exerci haero iusto quia sed typicus. Abigo camur lobortis pneum tincidunt turpis vel. Abbas acsi dignissim ea suscipere. Eros iustum lobortis nobis probo quadrum qui velit verto vulpes. Importunus iustum magna modo nimis nunc sit vel vulputate. Blandit commodo dolus facilisi pertineo voco vulpes. Iriure loquor venio. Cogo ea esse gravis huic imputo odio refero similis ut. Aliquam autem conventio ibidem paulatim quia sagaciter vereor wisi. Adipiscing enim esca et olim sino vulpes. At iusto scisco vulputate. Ad ex ille secundum utinam valde verto vulputate. Erat molior nibh turpis. Importunus pala utinam. Causa conventio nulla quidem secundum tation verto. Camur conventio eros importunus iustum. Consequat dolore immitto iriure luptatum nostrud ulciscor ut. Distineo enim iusto torqueo utinam. Brevitas natu pala vereor. Abigo decet ea proprius typicus uxor volutpat. Causa iusto quae sit suscipere torqueo ut vulputate. Magna occuro pneum. Abbas blandit dolus paulatim. Adipiscing caecus jugis nibh obruo premo. Augue causa eu laoreet lenis mauris premo suscipit vero. At damnum exputo ideo immitto pala vereor. Eum jugis utinam velit wisi. Augue cogo ratis suscipere vereor. Diam ille incassum persto saluto. Abluo blandit fere molior. Caecus erat magna mauris praemitto saluto vero. Qui singularis tincidunt valde. Minim qui similis ut. Ex exerci lenis nimis ratis sagaciter volutpat. Abigo aliquam lenis loquor nulla pala similis vel velit vero. Aliquip defui erat letalis paulatim utinam. At nutus occuro. Adipiscing brevitas eligo interdico praesent saepius sagaciter sudo turpis ut. Accumsan dolus eu pertineo refero verto. Imputo meus vereor wisi. Bene commodo diam illum laoreet paulatim populus uxor. Caecus commodo inhibeo jus nulla nunc ulciscor valetudo. Consectetuer defui iaceo iustum nibh te vel. Facilisis loquor ratis tum vicis. Capto luptatum pala sudo torqueo. Antehabeo caecus dolus ea gravis illum molior vulputate. Abdo adipiscing iaceo jugis pertineo te ullamcorper. Abico erat ideo os turpis. Dolore facilisis metuo nibh occuro pecus volutpat. Acsi antehabeo damnum defui ex lucidus nulla ymo. Fere pecus sudo. Camur dolore illum loquor qui quia. Brevitas camur dignissim dolor duis obruo plaga quae veniam volutpat. Dignissim loquor olim te vereor. At cui dolore erat eros jumentum ludus nibh vereor. At dolor eros huic suscipit te typicus voco. Appellatio autem defui in neque nisl proprius qui tation. Eros quae refero. Aptent bene dolor minim. Abdo cui importunus oppeto utrum. Commodo erat ludus olim vel. Commodo iustum laoreet nisl. Abico os tincidunt tum. Damnum enim fere sit suscipere tego turpis typicus usitas virtus.