Compression rate with Acronis TI 10.

Hi everyone,
My C drive weights 37,8 g.

When I set up an image job ,it says it will be reduced to 22,65 g if I use normal compression, which is the usual ratio.

However ,when the backup is done, I end up with an image of 26,30g.
How can this be explained?
Thank you.

 

It's just an estimate. The actual ratio can't be known until the backup has completed.

 

Diff files will compress diff amounts even if they are all the same type of file. But diff types of files will compress at even more varied rates. For example, jpegs and mps, which are heavily compressed to begin with, won't compress much if at all, even though they will add some compression overhead to the backup. Otoh, text files and bmp and tiff files with large areas of the same value will compress greatly. PDFs made with an old version of Adobe will compress while those made with newer versions are usually very well natively compressed already. zip and rar files won't compress as they are natively compressed. So your effective compresion ratio will depend on the content of your files and the types of files.

 

Hi,
Thanks to both of you.
But the thing is that I have just a little amount of compressed files ,mostly photos and almost no video or music.
Therefore ,I still presume there's a problem somewhere.

 

Your C drive is being reduced to 70% of its original size and that is not unreasonable. As was said, the original estimate is just that, an estimate, and I don't think it is even a calculated estimate based on your actual data.

 

Hello babac,

Thank you for your interesting in Acronis True Image

The compression level size is just estimated level, the compressed backup size may vary.

Acronis True Image Home 2009 supports the following compression levels:

- Normal (Recommended to most tasks. Archive size is 55 percent less than initial data size (approx, real value may vary) and the process takes minimal time)
- High (Archive size is 60 percent less than initial data size and the process takes 70% longer (approx, real values may vary)
- Maximum (Archive size is 65 percent less than initial data size and the process takes at least twice longer (approx, real values may vary).

Best regards,
--
Dmitry Nikolaev

 

Hello,
Thanks to all of you.

 

Heh, at least your's isnt estimating 3.5 gbs, and you end up with a 19 gb image !

That's what im getting. Ghost however get's the right results.