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Date: Sat, 12 Feb 2011 15:15:15 -0700 (MST)
From: Warren Block <wblock@wonkity.com>
To: Tim Kientzle <tim@kientzle.com>
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Cc: "Julian H. Stacey" <jhs@berklix.com>, hackers@freebsd.org
Subject: Re: memstick.img is bloated with 7% 2K blocks of nulls
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On Sat, 12 Feb 2011, Tim Kientzle wrote:

> Alternatively, of course, is there any way to use
> isofs instead of ufs for memstick.img?

Devin Teske's DruidBSD (http://druidbsd.sourceforge.net/) uses the same 
image for CD, hard disk, or memstick.  I don't know the technical 
details.  (VirtualBox didn't like it, but maybe it's a trivial fix.)