Writing on DM snapshots, and having no "mainstream" device (was: Re: Fw: [PATCH 1/7] Add dm-snapshot tutorial in Documentation)

[Blaisorblade]

On Wednesday 21 September 2005 17:48, Alasdair G Kergon wrote:
> On Tue, Sep 20, 2005 at 04:34:33PM -0700, Andrew Morton wrote:
> > ack?
>
> Applied some quick corrections to this.
I'm now looking at this, but you've done an error. You say that 

You must create the snapshot-origin device before you can create snapshots.

This is totally wrong. The whole point of my document is to show that you can 
create snapshots *WITHOUT* having a snapshot-origin device (yes, I did it).

And while the LVM setup (with snapshot-origin) is often used and well known, 
the possibility to do without the snapshot-origin, and more important to 
write on the snapshots, is something which is not widely known at all.

In fact, UML community has been using an in-house version of the same feature, 
which cannot be mounted on the host due to missing code.
> See also http://people.redhat.com/agk/talks/FOSDEM_2005/
> (slides 15-27)
Not yet had time to look at those, sorry.
> You might like to convert some of those diagrams to ASCII
> and include them?
If you feel like doing this, ok, but I'm not normally a documentor.
> Alasdair

-- 
Inform me of my mistakes, so I can keep imitating Homer Simpson's "Doh!".
Paolo Giarrusso, aka Blaisorblade (Skype ID "PaoloGiarrusso", ICQ 215621894)
http://www.user-mode-linux.org/~blaisorblade

	

	
		
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