the backup image size is larger than original data

Disk backup and restore, partition imaging and cloning, and drive copy using R-Drive Image.
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Zdilto
Posts: 4
Joined: Tue Feb 20, 2018 6:10 am

the backup image size is larger than original data

Post by Zdilto » Tue Feb 20, 2018 6:39 am

in a 10G disk with 400m data with compression=11 i got a backup image size = 1.5G using the following command line parameters:

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r-driveimagecl.exe  create -s=c: -a="d:\backup\test.rdr"  -c=11 -r="Test Backup"  -s-n -xe="%comspec% /c exit 1" -xs="%comspec% /c exit 0"
i don't know why resulting backup image size is bigger. no idea please help

Alt
Site Moderator
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Joined: Tue Nov 11, 2008 2:13 pm
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Re: the backup image size is larger than original data

Post by Alt » Wed Feb 21, 2018 10:31 am

That may happen when the files aren't compressible well. Try to reduce the compression level.

Zdilto
Posts: 4
Joined: Tue Feb 20, 2018 6:10 am

Re: the backup image size is larger than original data

Post by Zdilto » Thu Feb 22, 2018 7:48 am

no i tested a well compressible data like dll,text data files. tried dism.exe and wimlib-imagex.exe and backup image data reduced by 60 %
i also tested a full windows 7 backup with compression 11 and the resulting backup image is only reduced by less than 10% than original data
where as many Cli backup softwares free and commercial will compress system partition so well usually 50% to 60% reduction
i didn't test the compression using the gui yet,there is a chance that the gui compression work well but not the command line but i'm not really fond of the gui.
tried compressing virtual disk ,physical disk content no improvement.
using r-driveimagecl.exe product version: 4.3.2.2

Alt
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Re: the backup image size is larger than original data

Post by Alt » Thu Feb 22, 2018 8:56 am

Zdilto wrote:
Thu Feb 22, 2018 7:48 am
using r-driveimagecl.exe product version: 4.3.2.2
Maybe, it's time to test the newest version? It fully works for 1 month test time.

Zdilto
Posts: 4
Joined: Tue Feb 20, 2018 6:10 am

Re: the backup image size is larger than original data

Post by Zdilto » Thu Feb 22, 2018 2:30 pm

after i downloaded the software ,i found that i'm using already the latest cli version which is: 4.3.2.2 and the latest gui version is: 6.1.6. 109
i'll try compression with the gui just for test as i will not use it for my tasks.

Zdilto
Posts: 4
Joined: Tue Feb 20, 2018 6:10 am

Re: the backup image size is larger than original data

Post by Zdilto » Thu Feb 22, 2018 2:58 pm

shit no cli compression support in winpe environment

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