On Fri, Nov 09, 2012 at 04:14:47PM +0100, Volker Armin Hemmann wrote:
> Am Freitag, 9. November 2012, 01:38:41 schrieb mindrunner:
> > volker, what is your intention to say i am dumb and stupid. actually you
> > do not know me.
>
> everybody does something dumb and/or stupid once in a while. I average that
> one to 1/day.
>
> There are two ways to react if someone points out that something you do is
> not
> the best idea since sliced bread.
>
> -> oops. Yeah, I see it.
> or
> -> sulking.
>
> >
> > copying on block device level has of cource advantages. and really... i
> > dont care about 0.4% fragemntation and some journal log.
> >
>
> no, it does not. Apart from fragmentation you also copy all deleted files.
> All
> damaged blocks AND the UUID.
>
> Oh, and it is slow (I know, fiddling with blocksize etc you can speed it up a
> lot. Still slow).
>
> > I never made bad experiences with this copy technique.
>
> which doesn't mean it is a good one.
>
> > all my hard drives, ssd and virtual containers are working fine without
> > any performance issues.
>
> How do you know?
>
> > so what exactly is your problem?
>
> you are telling someone to do something really stupid.
>
> Create an image with dd to do some file rescuing? forensic stuff? as a
> template
> for containers? To burn it on a dvd/cd? Well, those are valid uses for dd.
> Converting files? Yes, that is what dd was made for.
>
> Copying a partition to another disk, different disk? Wow.. that is just
> wrong.
> Even if both disks were identical it would not be great idea. Just a 'well,
> it
> does work and at least I am not punishing the new disk' way to do it.
>
> Mind you, cp -auv is not the best way either. With ACLs&co it is not such a
> good choice. And I am surprised that Joerg Schilling hasn't posted how
> incredible star is for this job yet. Btw, star is a really good tool for the
> job. It just needs a lot of typing.
>
> tar, rsync, cp, star... there are many good or good enough ways to copy files
> from one harddisk to another
>
> dd doesn't belong in that category.
>
> -
> #163933
Spot on! Here you can be nice and explain to the guy your reasoning behind
telling him using dd{whatever} for this job is stupid.
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