Holger Parplies wrote:
>
> Chances are, you
> should be aware of what will happen. But still: extensive, potentially
> destructive operations happening automatically without a chance of user
> interaction is something that belongs in the world of Windoze. Linux is
> becoming more like that fast enough already, so I won't let this chance pass
> to argument against it :-).

But this is the backuppc list where you might not be running Linux... I 
still think zfs with it's incremental send/receive operation might be 
the way to go to duplicate changes in the archive filesystem, but 
haven't been able to do any testing myself yet.

> Of course there's also the chance of you simply plugging the drive in at an
> inappropriate moment, when you wouldn't want the sync to happen. You might
> notice it when logging in to call the script to start the sync, but you won't
> log in just to check, if you went to the trouble of automating the sync in the
> first place, will you?
> 
> Just because you *can* automate something, that doesn't necessarily mean it's
> a good idea to do it. Then again, under some circumstances it may well be.

Another alternative that seems like it should work is to plug the 
external drive into some other machine on a fast lan, export the 
partition via iscsi, then add the iscsi device to the raid set.  Really 
the same scenario, but you wouldn't have to walk over to the server room 
or keep the server at your desk.

-- 
   Les Mikesell
    lesmikesell AT gmail DOT com

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