Delete interim backups?

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If I make a Full backup on a Monday, say, and then daily differential backups for the next six days but have no need to access them, would there be any problem in deleting the interim six files and running differential again?

I suppose I'm asking, does TI go entirely on contents of disk for file differential or is there file tracking in the registry which would make my simple strategy problematic?

Gio, 12/02/2010 - 22:24
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It hard to predict how TI will react. If you delete all prior differentials and then create a new one, past versions would not validate new creation as the prior parts were missing and yet you coulld perform a successful restore with the newest and the base--so there has been a mixture of success and failures.

All I can say is to try. Move the differentials to a separate folder so they are retained but not part of the original storage folder. Then perform your tests and attempt a validation as part of the creation or as a separate task. Let us know the results.

Based on your results you can then decide whether to delete the old incrementals or copy them back to their original position.

Ven, 12/03/2010 - 00:17
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I had seven days worth of of backup, one full backup followed by 6 days of differential backups.

I moved the six differential backups to another folder and did a new differential on the original full back up. Thus there were 7 days between the full back up and the next differential.

The differential verified ok but was smaller than I expected at 2.5GB, my full backup being 156Gb. It had verified OK according to the log but when I tried to mount it, reported 'this volume cannot be mounted'.

So the answer to my question would appear to be, no you cannot do this.

Dom, 12/05/2010 - 23:16
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Yes, it would appear your testing indicates this. What about putting the 6 files back and see if you can mount the new diff.
What number did it assign to the new diff?

Dom, 12/05/2010 - 23:31
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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I'd actually deleted the 6 diffs but tried again with a new full backup on which I'd done one differential backup. I removed the diff and ran TI again. The file names were c-d_w04_12_2010.tib and c-d_w06_12_2010.tib, reflecting the date of the backups.

This time the diff both verified AND mounted properly. So the answer to my question appears to be yes in this case but no in the other. Definately a maybe, I'd say!

In theory with a differential backup you only need one diff and the full backup so there should be no problem in dumping some and making another. Maybe someone from Acronis has an answer?

Lun, 12/06/2010 - 14:02
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I think this is an important question as the point of going differential over incremental is that you are NOT dependent upon prior differentials, only the original backup.

I don't think it's uncommon to delete interim differentials to free up disk space and they obviously grow in size the more you perform.

Would love to see and official answer from Acronis on this!

Lun, 12/06/2010 - 17:40