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Re (2): HOW does 'loop' work ?

Cross-posted to 2 groups.

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In article <ip1eff$9ar$1@dont-email.me>, Tauno Voipio <tauno.voipio@notused.fi.invalid> wrote: 

> On 24.4.11 2:28 , no.top.post@gmail.com wrote:
> > References:<iohio5$rs4$1@dont-email.me>
> >
> > In article<iohio5$rs4$1@dont-email.me>, Tauno Voipio<tauno.voipio@notused.fi.invalid>  wrote:
-- snip --
> > For making a bootable-USBstik, why do they need to go via 
> > loop, instead of just directly writing [cp &  edit] to the USBstik.
> 
> The main reason seems to limit the count of writes on the
> Flash chips in the USB stick. Building the file system
> needs plenty of writes and re-writes on the base file
> device. It loads the stick much less when a ready-made
> image is just transferred to the stick.
> 
OK, this suble reason, is what adds complication in understanding
the 'model', and <loopFS> existed BEFORE Flash chips.
What was the motivation/use originally?

> > A confusing fact, confirmed experimentally,
> > which may be relevant,
> > is that a 'new' `mount<device>  /mnt`,
> > masks only PART of the previous '/mnt-tree'.
> 
> I do not quite grab you - the mount masks the
> whole file tree under the mount point, and only it.
> Just read any textbook on Unix file systems.

Yes I discovered that refinement 'during this tutorial'.
It allows suble side effects.
Previously I thought `mount /dev/hd1 /mnt/tmp; 
mount /dev/hd2 /mnt/tmp`  would report an error.

Also the related `bind` confuses me.
If `bind` allows 2 different 'targets to be mounted at the
same mount-point, which one is accessed by
<read mount-point> ?

Thanks,

== Chris Glur.        I can only access Inet on weekends.

PS. is it possible/viable to install
 ' Macintosh; U; Intel Mac OS X 10.6'
on a stock/commodity /WinTelPC ?

I had to buy a WinTel notebook to use my during-the-week
fixed-wireless-termial, which d/l-s its driver to the PC via 
'zero-CD'/simulated-cd technology.
There's no linux driver; but apparently a 'Mac' driver,
and I hate using the WinTel netbook.

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Re: HOW does 'loop' work ? no.top.post@gmail.com - 2011-04-24 11:28 +0000
  Re: HOW does 'loop' work ? Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2011-04-24 18:09 +0300
    Re (2): HOW does 'loop' work ? no.top.post@gmail.com - 2011-04-25 18:43 +0000
      Re: Re (2): HOW does 'loop' work ? Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2011-04-25 22:36 +0300
      Re: Re (2): HOW does 'loop' work ? Kevin Snodgrass <kdsnodgrass@yahoo.com> - 2011-04-26 00:02 +0000
        Re (3): HOW does 'loop' work ? no.top.post@gmail.com - 2011-04-27 13:16 +0000
      Re: Re (2): HOW does 'loop' work ? Robert Nichols <SEE_SIGNATURE@localhost.localdomain.invalid> - 2011-04-25 22:16 -0500

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