November 17, 2014

Space-Efficient Hard Drive Images with dd

dd is able to copy every single bit of data from a source volume to some other destination. This is cool for some applications but has drawbacks when you simply want to make a backup of a volume: even when your volume is only -let's say- half full, the copy will be as big as the entire volume. Furthermore, when you pipe the data stream read by dd through gzip it won't compress well. Read more

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