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The Monday 2007-12-31 at 04:16 -0500, Aaron Kulkis wrote:
But I believe plain dar is. I found it to slow, though. I wish rsync could
do a little compresion...
Compression is good until you get an erroneous bit.
then it makes your life miserable.
Did you ever use the old PCBackup for Dos, from PC Tools (Central Point
Software)? I have backups made in 80 5ΒΌ floppies and still recoverable.
They are compressed, yes, but they also contain recovery data to repair
read errors. In fact, they do have sectors with errors, and the software
is able to get the whole good data out of them, about twenty years later.
And it was so fast I barely had time to label one floppy before it asked
for the next one.
We don't have such a tool in Linux. The technology is out there somewhere,
but I don't know of a tool that can record (and do it fast) removable
media compressed with recovery data designed to bypass the common types of
media errors. Think of a DVD with a .tgz archive... a scratch, an error,
and the entire archive is useless.
I'm not talking of state of the art maximum compression: only some
compression.
- --
Cheers,
Carlos E. R.
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