Re: cd burning: kernel / userspace?

[Alan Jenkins]

Wakko Warner wrote:

> > Sorry, I'm not very good at this list / person CC stuff.  I sent a reply 
> > to Valdis.Kletnieks@xxxxxx, but forgot to CC to list.  Contents as follows:
> >
> > I'm not sure this is necessary.  Can't you just do:
> >
> > # dump -0 -B 700000 -u -z3 /home -f -| cdrecord /dev/hdb -
> >
> > dump and cdrecord allow you to use "-" as a filename to indicate that 
> > output shoud be written to stdout and input should be read from stdin 
> > respectively.
> >    
>
> Yes, but if I was to understand it right, dump will close/reopen at "700000"
> (whatever that is, 700000kb?).  That won't work with cdrecord since it's
> expecting a single input stream, not many seperated by a pause.  I'd
> consider it more like using tar with the multiple tape option.  When it is
> finished writing to a tape, it'll wait for the user to physically change
> tapes and start writing at the beginning of the new tape.
>
>  
I get it now.  BTW, if dump can determine when the end of the media is 
reached it will close / reopen automatically, so it might also be 
possible to drop the -B option and make full use of media of different 
sizes (you can backup more data to an 80 minute CDR, less to a "business 
card" format one).  You couldn't do that with "playing double-buffering 
games using -F to switch around".
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