On Tue, 22 Apr 2008, Ralf Bertling wrote:

> Hi Bob,
> If I was willing to do that I would simply build a pool from file-
> based storage being n-ISO images.
> It would involve the following steps
> 1. create blank ISO images of the size of your media
> 2. zpool create wormyz raidz2 image1.iso image2.iso image3.iso ...
> 3. Move your data to the pool
> 4. export the pool
> 5. burn the media
>
> If you need to recover, copy the data from the device using dd
> conv=sync,noerror

Yes, I know that this will work and what I thought of.  But I was 
thinking that perhaps ZFS would be able to attach to the read-only 
pool. At the moment it is likely not willing to attach to read-only 
devices since part of its function depends on writing.

> The "problem" here is that by putting the data away from your machine,
> you loose the chance to "scrub"
> it on a regular basis, i.e. there is always the risk of silent
> corruption.

Running a scrub is pointless since the media is not writeable. :-)

> I am not an expert, but the MTTDL is in tousands of years when using
> raidz2 with a hot-spare and regular scrubbing.

A thousand years ago, knights were storming castle calls.

Bob
======================================
Bob Friesenhahn
[EMAIL PROTECTED], http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/

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