Packet writing and backups (was: Re: program for backing up data)
On May 19 2003, Nirmal Govind wrote:
> Hi.. is there a free program for backing up specific folders on the
> hard disk onto a CD or external hard disk? I mean something that
> doesn't overwrite files that haven't changed etc. and only makes the
> necessary addition/deletion/replacement...
This thread is quite appropriate, as I've currently looking
for ways to automate more and more of my tasks.
I'm also looking to *wisely* use tools to lower the effort
sufficient to restore data in a crash-recovery situation
and making my data cleaner/cross-platform as well as
generating portable backups are both vital parts of my plan.
I want to make backups of files that are not very much
compressible (mpeg files, for instance) and that potentially
span multiple CD-RWs.
The closest to the ideal situation that I found was to use my
CD-RW with packet writing tools. This way, I think that I can
just use tar with its multivolume switch (-M) and backup the
way I want.
If, on the other hand, one wishes to use the CD-RW as a live
filesystem for day-to-day work, I would think that rsync would
do the trick.
More information about packet writing can be found at
<http://packet-cd.sourceforge.net/> and recent patches at
space tools are already packaged for Debian in form of the
I am compiling my kernel (on i386) with packet writing support
right now and I'll keep the list posted on the results I get.
I'd appreciate if other people did the same.
> would be even better if there was something that creates a
> compressed image or something and
With packet writing, one could use tools like gzip or bzip2...
> writes that to the CD if the total size of data to be backed up is
> greater than 650 or 700MB..
Humm, this doesn't make sense to me (but I am not properly
awake). Did you mean that you wanted to use multiple CDs for
I would love to know about other's experiences regarding
packet writing and support for this feature.
Rogério Brito - email@example.com - http://www.ime.usp.br/~rbrito