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Confused about backup file size

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I just got ATI 2010 and don't get the file size. The partition I backed up was 220 gigs at normal compression, the tib backup file size was 220 gigs. Why would the backup file size be larger if it uses normal compression?

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Reading your posting I decided to check mine.  Comparing an image I find it to be 74% of the full partition using normal compression.  This is rather typical but realize that some files (i.e. JPG) are already compressed so they will not be compressed significantly any further.  I have a single partition with mostly business applications and very few pictures.

Thank yoou. I have thousands of jeg and photoshop file, and as you say, some my not be further compressed. I get that. But why would the tib be larger though. Worst case is it would be the same size I would think. I do not have the sector by sector option check which I hear increases the file size. But I don't use that option.

You stated that both are 220 GB.  So if that's true the TIB file is not larger.  Perhaps there was a typo in your post.  The image should not be larger than the source.  Do you by chance have any hidden partitions, I'm thinking that might have been provided by an OEM (Dell, HP etc.)?

I did make a mistake. The partition is 220g. the tib is 222 gig. I checked on any hidden files and there were some that total 220 megs. So I'm still over on the tib by about 1.87 gigs. Thanks for the help and any further. :)

And a follow up question. Do you know if TI compress RAW or PSD files? The first is a camera image format, the latter is a photoshop format? Thanks

I'm not familiar with those formats.  Perhaps other users will jump in and offer their thoughts.

Bruce

Joseph,

Based on the content of your data to be backed up, I suggest you read all listings under item 12 inside my signature link. There are varied opinions in the use of TrueImage where pictures are significantly  involved.