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Re: [zfs-discuss] Poor man's backup by attaching/detaching mirror drives

Subject: Re: [zfs-discuss] Poor man's backup by attaching/detaching mirror drives on a _striped_ pool?
From: Mark J Musante
Date: Thu, 12 Apr 2007 08:05:13 -0400 EDT
On Wed, 11 Apr 2007, Constantin Gonzalez Schmitz wrote:

> So, instead of detaching, would unplugging, then detaching work?

I don't see why that couldn't work.  The original question of striped
mirrors would be similar:

 - zpool create tank mirror <dev1> <dev2> mirror <dev3> <dev4>
 - {physically move <dev2> and <dev4> to new box}
 - zpool detach <dev2>
 - zpool detach <dev4>

On the new box:
 - zpool import tank
 - zpool detach <dev1>
 - zpool detach <dev3>


> Thinking along similar lines, would it be a useful RFE to allow
> asynchronous mirroring like this:
>
> - <dev1>, <dev2> are both 250GB, <dev3> is 500GB
> - zpool create tank mirror <dev1>,<dev2> <dev3>

That's an interesting idea.  Of course, you could do that today by
splitting <dev3> into two 250gb partitions.  An RFE to make it easier to
do these kind of 'sneakernet' backups might worth filing.



Regards,
markm
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