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Date: Thu, 24 May 2007 14:16:30 +0700 (ICT)
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From: Olivier Nicole <on@cs.ait.ac.th>
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Cc: freebsd-questions@freebsd.org
Subject: Re: Backup advice
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> 2 x system space would be enough for a full dump plus plenty of  
> increments, I'd say.  No?  Is there a rule of thumb?  3x?  4x?

That depends how much your file system change. If every ficle change
befor the incremental run, dump 1 will be equal to dump 2, and 2x will
be enough for just dump0 and dump 1.

There is no rule.

Olivier