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Old 07-22-2012, 05:18 PM
Jarry
 
Default How can I rewrite all empty sectors with zeros?

Hi,
I want to backup my whole hard-drive (8 partitions) with:
# dd if=/dev/sda | gzip > /path/image.gz

In order to achieve good compression level I'd like to wipe
out all empty space with zeros. How can I do that?

Jarry
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