Re: Speedup cp command?

[Richard Owlett <rowlett@cloud85.net>]

On 8/23/2016 4:05 PM, Andrew M.A. Cater wrote:
> On Tue, Aug 23, 2016 at 03:18:30PM -0500, Richard Owlett wrote:
> > I'm copying Debian distribution DVDs.
> > I used
> >    cp -R /media/cdrom0 /media/richard/myrepository/dvd_1
> >
> > It gave me what I wanted [*N.B.* I did not want dvd_1.iso]
> > It was SLOW.
> > The man page for rsync suggested that it could do it faster.
> > Can it?
> > If so, what is correct syntax to get the same result as the command above?
> >
> > TIA
>
> Loop mount the DVD
>
> mount -t iso /media/cdrom0 -o loop /mnt
>
> cd /mnt
>
> and you should see all the files within the DVD.
>
> cd /media/richard/repository/dvd_1/
>
> rsync -pavz /mnt/ .
>
> Should do it. If you stop and restart rsync, it should start from the place it left off,more or less.
>
> Hope this helps,
>
> AndyC

Thanks. I'll try it as soon as copy of DVD#2 ends.
What's special about a loop mount in this circumstance? As I read 
the rsync man page it was pretty similar to cp and it had 
accepted a plain automount [I'm on Jessie with Mate DE]]