On Sunday 22 Jul 2012 18:45:50 Alex Schuster wrote: > Jarry writes: > > 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? > > You can create files containing only zeros on all partitions until > they are full. Like this: > > for i in 5 6 7 8 9 10 11 12 > do > mount /dev/sda$i /mnt > dd if=/dev/zero of=/mnt/zero > rm /mnt/zero > umount /mnt > done > > Wonko
Only to add that using bs=4096 or bs=2048 would help this take less than a week waiting for it to finish. :-) -- Regards, Mick
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