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Udo Carl
Username: blowtorch

Registered: N/A
Posted on Wednesday, Apr 16, 2008 - 3:34:   

Hallo,
the function 'Create Disk Image' allows to 'Store free clusters as zero-value bytes'. That's a very useful feature since compression ratio raises significantly. But restoration of say 20GB with only 1GB allocated data would write 20GB nevertheless since there is no function to take those 'zero-values' into account.

For example, if i have a clean defragmented partition it would make sense to create an optional 'free-space sector map' (or allocation map) that could be stored separately that will be used for restoration. Even if only full-zero sectors (no slackspace sectors) would be cared of it should give a huge time saving when restoring the image. There could be two options. 'Original image' (with zero sectors - dd compatible) or 'stripped image' (zero sectors stripped out - proprietary). To reduce overhead a 'threshold' value should be definable (eg. only mark free space areas greater than ?? kb).

Or did i miss something and its already implemented?

What do you think?
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Stefan Fleischmann
Username: admin

Registered: 1-2001
Posted on Wednesday, Apr 16, 2008 - 11:26:   

Yes, sure that would be useful.

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