From: Niall (niall at domain mailtest.inpho.ie)
Date: Thu 10 Feb 2000 - 14:22:06 GMT
On Thu, 10 Feb 2000, Johno Sullivan wrote:
> >Hmm . . CD to CD copying involves reading CD, making an ISO fs from it to
> >stdout and piping that to a CD recording process. Presumably you're going
> >to need at least as much free VM as the size of the CD plus some for
> >overhead.
>
> I doubt thats absolutely necessary.. I moved >4Gb of files from one disk
> to another through std{in,out} with 128mb of swapspace..
> tar cf - dir | (cd /newdir ; tar xf -)
Hmm - we're comparing apples with oranges here. Copying is a pass through
process and I imagined that making an ISO FS would not be. So I decided to
stop speculating and as I type I'm running mkisofs with output to a pipe
and its maximum size has been about 1200 K which is hardly onerous.
cdrecord must by its nature be passthrough (this is after all the source
of potential problems) so it seems that copying a data CD with
mkisofs|cdrecord is quite possible in low disk space. However, you're
likely to waste CDs if either of the processes get swapped out.
Regards,
Niall
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