Advantages of splitting a backup

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truwrikodrorowrelupicugojestutroclulachosaswunuhospikigawakijosaswenomaruclojeueclikaspedrubewidebrisubrohutrurifruuagothunugekedrumucisiuobrobrecrupeslapuswosluprothethibakaslechurathikucli
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I have about 800 GB of data and am trying to understand the advantages of splitting the backup beyond the obvious, i.e. being able to backup on lower capacity media like DVD, flash drives, etc. I intend to create the backup on a large 1.5TB HDD and not on any smaller removable media. Is there any information available on pros and cons of split image (presuming that each split is 4.7GB) vs one giant image, in the context of the following questions?

1. Incremental backups will be faster in which scenario : split image vs single giant image?
2. What will be the impact on recovery performance?
3. What if the a number of disk sectors used by the image[s] gets corrupted eventually : does the entire image become unrecoverable - split or not? or can I recover data from the split images that do not have disk sector corruption?
4. What will be the performance impact [not looking for exact numbers but more of a guideline] on backup consolidation?

Thanks

Sat, 02/04/2012 - 05:59
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truwrikodrorowrelupicugojestutroclulachosaswunuhospikigawakijosaswenomaruclojeueclikaspedrubewidebrisubrohutrurifruuagothunugekedrumucisiuobrobrecrupeslapuswosluprothethibakaslechurathikucli
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I don't see any advantage to using splitting if you are using HDD swapping or a storage array.
I am using an openfiler box (iscsi) storage array and store about 3 months (9 Terabytes) worth of backups.
I am looking at buying another 2 boxes to try Deduplication on 2011. Never had any luck with 2010.

Mon, 02/06/2012 - 13:45