[wplug] backing up

[Embery, Nathan]

I quick perusal of Sourceforge.net led me to kdar, which in turn let me to
this
http://dar.linux.free.fr

from the website: 
Dar stands for Disk ARchive. From the beginning it was designed to be able
to split an archive over several removable media whatever their number is
and whatever their size is. Thus dar is able to save over small floppy disk,
CD-R, DVD-R, CD-RW, DVD-RW, Zip, Jazz, etc... Dar is not concerned by
un/mounting a removable medium, instead it is independent of hardware. Given
the size, it will split the archive in several files (called SLICES),
eventually pausing before creating the next one, allowing this way, the user
to un/mount a medium, burn the file on CD-R, send it by email (if your mail
system does not allow huge file in emails, dar can help you here also). By
default, (no size specified), dar will make one slice (or file) whatever its
size is. Additionally, the size of the first slice can be specified
separately, if for example you want first to fulfil an partially filled disk
before starting using empty ones for following slices. Last, at restoration
time, dar will just pause and prompt the user asking a slice only if it is
missing.

I'd be interested in hearing how well this works BTW if you try it...
Nate


-----Original Message-----
From: Vanco, Don [mailto:don.vanco at agilysys.com]
Sent: Thursday, April 01, 2004 2:36 PM
To: General user list
Subject: RE: [wplug] backing up


wplug-bounces+don.vanco=agilysys.com at wplug.org wrote:
> squeegy-wplug at squeegy.org wrote:
>> Ok, here is what I want to do.  I want to backup a directory tree to
>> cdr that
>  > greatly exceeds the 700MB.  I would like pass this info to
> a backup program  > and have it just prompt me for cds as it
> needs them.  Is there a backup program  > for linux that will
> do this?  I have seen some cool stuff for tape, but I don't
>> have tape.  It would be best if I could access the files on
> the cd without the  > backup program but not nessesary.
> Thanks for the help.
> 
> I don't know of anything specifically for doing this, and
> I've been considering starting a project to create something ...
> 
> However, if you have workspace, you could tar/zip all the
> data and then use
> split(1) to break the archive up into bits small enough to
> fit on CDs.  This requires some magic to restore from (as
> well as enough workpace to put the entire archive back
> together ...) but it's one possibility.
> 
> This is why I wanted to start a project: this is something
> that could be scripted!

Jeremey Wise (list member and cohort in crime here at Agilysious) posted
on this some months ago.  To my knowledge he never found a reliable way
to make this work. That being said, I believe that if you search
archives you'll at least see what code he was able to get together.

Frankly - I'm amazed that no one in the Open Source realm has come up
with this yet - there's lots of false starts documented on
SourceForge.... but no one have ever made it without biting. Ask Mr.
Owl.

Don

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