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From: Quartz <quartz@sneakertech.com>
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Subject: Re: Storage question
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>> Note also the “dnr” datasets :-)
>
> Btw, you seem to be going with the 'dummy dataset' method for preventing
> fs fillup. What's the advantage of doing it this way vs refreservation
> or any other method?

More specifically, dummy datasets strike me as kind of the ugly way of 
handling this issue. Isn't it better to just set parameters on your real 
datasets?