Re: Tools in Debian to create whole disk image (multiple partitions)?
On Mon, 23 Jul 2012, Henrique de Moraes Holschuh wrote:
> 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.
Ah yes, better disclaim it: that's for spinning rust and RAM-based
drives only! Don't do it on solid-state devices with limited
write-cycles such as FLASH-based devices (i.e. SSDs, pendrives, SD
"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