Re: Tools in Debian to create whole disk image (multiple partitions)?
On Mon, 23 Jul 2012, Gary Dale wrote:
> compressible. You can also zero the empty space on the main
> partition, which should make it also compress quite well.
> BitShredder can do this. If the partition has the free space zeroed,
> it should compress down to a manageable size.
On most filesystems (not on btrfs, for example), "dd if=/dev/zero
of=somefile bs=1M ; rm somefile" (as root) will happily zero all the data
area in the filesystem that hosts somefile (provided it is otherwise idle).
Zeroing stale metadata areas is filesystem-version-specific, dangerous, and
not worth the effort.
--
"One disk to rule them all, One disk to find them. One disk to bring
them all and in the darkness grind them. In the Land of Redmond
where the shadows lie." -- The Silicon Valley Tarot
Henrique Holschuh
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