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Re: Extremely large level 1 backups with dump

On Wed, 01 Dec 2010 21:58:49 -0800, Peter Tenenbaum wrote:

> I've been using dump to perform backups of my home Debian workstation (I
> run squeeze, btw).  I do a weekly level 0 dump and daily level 1 dumps.
> For some reason the level 1 backups are almost as large as the level 0
> (the level 0 is 57.9 GB and the level 1 is 51.6 GB), even though we
> clearly don't modify anything like that many files in the interval from
> one day to the next.  The commands that I am using for these backups are
> of the form:
> dump -0u -f "/media/FreeAgent Drive/filename0" -A "media/FreeAgent
> Drive/archive0" /dev/md3
> dump -1u -f "/media/FreeAgent Drive/filename1" -A "media/FreeAgent
> Drive/archive1" /dev/md3
> where /dev/md3 is my RAID1 array root partition.
> Any idea why the level-1 backups are almost as large as the level-0?

Maybe because the data source to backup (/dev/md3) is in use ("live" 
system) so file time stamps are constantly changing and puzzling 
"dump" :-?



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