Re: cd burning: kernel / userspace?

[Alan Jenkins <sourcejedi@phonecoop.coop>]

Wakko Warner wrote:

>>Sorry, I'm not very good at this list / person CC stuff.  I sent a reply 
>>to Valdis.Kletnieks@vt.edu, 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".