Hi,
--- Ow Mun Heng <Ow.Mun.Heng(a)wdc.com> wrote: > On
Wed, 2004-05-26 at 11:42, David Maynard wrote:
> I would suspect that some of the source files are
"sparse." Ie. there are
> "holes" in the middle of them where space hasn't
been allocated in the
> source directory. Some applications that use
random file access will create
> sparse files. A simple copy operation that
doesn't look for sparse files
> will fill in the holes, causing the copy to take
up more space than the
> original.
>
> I haven't tried it (at least not recently), but
rsync appears to have a
> "--sparse" (-S) option. Try using that in
addition to -av and see if that
> changes the results. GNU tar has a similar
option.
Actually, if you're trying to copy all the files
from A to B, where B is
a Fresh directory, It's advisable to use GNU Tar.
it'll speed up the
transfer and it'll ensure that permissions are kept
as they should.
After tha Rsync them for incremental backup etc.
my 2 cents
For the people following this sage here is the result
of the rsync withOUT the -S option:
/dev/md6 85419328 79678740 1401448
99% /data01
/dev/hdf1 241263968 124262976 117000992
52% /data02
So the problem is sparse files.
I wonder if tar takes this into account also?
Michael.
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