Sector by sector-How does this happen?

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truwrikodrorowrelupicugojestutroclulachosaswunuhospikigawakijosaswenomaruclojeueclikaspedrubewidebrisubrohutrurifruuagothunugekedrumucisiuobrobrecrupeslapuswosluprothethibakaslechurathikucli
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I have an acer one with an 8GB ssd hard drive. I have installed ubuntu and used EXT4 file system. As this is not supported I have used sector by sector disk backup. However it only produces a 1.8GB backup file. Surely this should not happen as all free space should also be backed up.
BTW to test it I used another backup method (on USB stick) then deliberately damaged the system and restored with Acronis. It worked! Not complaining about this obviously but do not understand what is happening.

In the future I will fit a bigger ssd hard drive and my other backup method would prove more difficult so want to know if I can rely on Acronis.

Fri, 05/14/2010 - 10:59
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truwrikodrorowrelupicugojestutroclulachosaswunuhospikigawakijosaswenomaruclojeueclikaspedrubewidebrisubrohutrurifruuagothunugekedrumucisiuobrobrecrupeslapuswosluprothethibakaslechurathikucli
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Perhaps the unused sectors are filled with the same values and the compression was able to achieve a large amount of compression. If this sounds reasonable try it with no compression.

Fri, 05/14/2010 - 13:55
truwrikodrorowrelupicugojestutroclulachosaswunuhospikigawakijosaswenomaruclojeueclikaspedrubewidebrisubrohutrurifruuagothunugekedrumucisiuobrobrecrupeslapuswosluprothethibakaslechurathikucli
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Yes I have zeroed the free space but I did not think sector by sector backup was capable of compression.

Sat, 05/15/2010 - 06:48
truwrikodrorowrelupicugojestutroclulachosaswunuhospikigawakijosaswenomaruclojeueclikaspedrubewidebrisubrohutrurifruuagothunugekedrumucisiuobrobrecrupeslapuswosluprothethibakaslechurathikucli
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I checked and selecting a sector-by-sector backup still allows you set compression values in the options menu so it can compress. I don't think compression is at odds with a sector-by-sector backup since the data of all the sectors is still read and stored abeit in a compressed mode. Decompression returns the data to its original state so no problem.

Sat, 05/15/2010 - 16:02