Newbie question: How much space does inc and diff backups take?

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truwrikodrorowrelupicugojestutroclulachosaswunuhospikigawakijosaswenomaruclojeueclikaspedrubewidebrisubrohutrurifruuagothunugekedrumucisiuobrobrecrupeslapuswosluprothethibakaslechurathikucli
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Looking to make a full backup weekly of a 2008 R2 server which has the OS + a 6TB hard drive with install files, customer bills, and a couple of other things saved on it/to it.

After that, do incremental or differential backups daily.

At the end of the week, move original and all the inc/diffs over to an offsite machine via internet.

We would add probably 30MB per day on an average day, up to 500MB
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1. What would be the size of the daily backups (for example Wednesday's diff) individually?
2. What would be the size of the daily backups (for example Wednesday's inc) individually?

I may not be explaining this correctly, so let me know if something's unclear.

Thu, 01/26/2012 - 17:19
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truwrikodrorowrelupicugojestutroclulachosaswunuhospikigawakijosaswenomaruclojeueclikaspedrubewidebrisubrohutrurifruuagothunugekedrumucisiuobrobrecrupeslapuswosluprothethibakaslechurathikucli
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Incrementals will take exactly the amount of daily changes - from 30 MB to 500 MB. Differentials, if the usage scenario is not like modifying the same files over the week, will be roughly the sum of incrementals for previous days - 90 mb for Wednesday's one. If same files are changed, it will be smaller.
Btw, how large is the system disk (and %% of free space on it) and how many files are on the data disk?

Thu, 01/26/2012 - 17:50
truwrikodrorowrelupicugojestutroclulachosaswunuhospikigawakijosaswenomaruclojeueclikaspedrubewidebrisubrohutrurifruuagothunugekedrumucisiuobrobrecrupeslapuswosluprothethibakaslechurathikucli
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The generic rule/estimate for incrementals backups is about 15% of a full...but it really depends on the amount of changes. YMMV.

As for Diff vs Inc... Differential is amount of changes since last full backup. You take a full backup on Sunday. Monday's Diff will be 30mb-500Mb; Tuesday diff will be Monday's Diff amount + 30mb-500mb...and so on. Incremental backups would be simply the changes each day.

Fri, 01/27/2012 - 14:27
truwrikodrorowrelupicugojestutroclulachosaswunuhospikigawakijosaswenomaruclojeueclikaspedrubewidebrisubrohutrurifruuagothunugekedrumucisiuobrobrecrupeslapuswosluprothethibakaslechurathikucli
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System: 19GB full, 129GB free.
Data disk: 919,500 files, 860GB used of 5TB

I assume it's 12 GB free instead of 129. If you're going to use ABR11, partially because of this http://kb.acronis.com/content/12062 (a temp file created strictly on system drive)- and especially before release of the next announced build I'd recommend to avoid backing up huge number of files (and 1 mln is huge) as file backup. Split them to several pieces of roughly equal size if you can afford it (i.e. file set backed up for a day will not represent specific point in time) or use disk backup.

Sat, 01/28/2012 - 00:26
truwrikodrorowrelupicugojestutroclulachosaswunuhospikigawakijosaswenomaruclojeueclikaspedrubewidebrisubrohutrurifruuagothunugekedrumucisiuobrobrecrupeslapuswosluprothethibakaslechurathikucli
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It is actually 129 free.

I guess I'm unsure of what you mean by disk backup vs file backup.

Second kind of related question:

What kind of space would one need to store ALL (full+each day's diff.) backups?
Like the full 6TB original backup + monday's diff. + tues diff. + (every day that week)

Would that equal:

6TB+30mb+30mb+60mb+120mb+240+480+960+1920= ? Or

6TB+30mb+30mb+30mb+30mb+30mb+30mb+30mb= ?

Tue, 01/31/2012 - 16:25
truwrikodrorowrelupicugojestutroclulachosaswunuhospikigawakijosaswenomaruclojeueclikaspedrubewidebrisubrohutrurifruuagothunugekedrumucisiuobrobrecrupeslapuswosluprothethibakaslechurathikucli
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Regarding partition vs file backup (from ABR11 help)- http://www.acronis.com/support/documentation/ABR11/index.html#738.html

About size - neither.
For differentials it would be 6TB+30mb+60mb+90mb+120mb+150mb. Then you move it offsite and (I presume ) start over with new full. Second with all backups equal to 30 mbs is when incremental type is used.

Tue, 01/31/2012 - 20:55