Date: Thu, 20 Oct 2005 02:11:42 +0200 From: "Frank J. Beckmann" <frank@barda.agala.net> To: freebsd-geom@freebsd.org Subject: Re: What is gzero? Message-ID: <200510200211.44650.frank@barda.agala.net> In-Reply-To: <20050926212605.GB20833@odin.ac.hmc.edu> References: <200509262227.46975.frank@barda.agala.net> <200509262304.40932.frank@barda.agala.net> <20050926212605.GB20833@odin.ac.hmc.edu>
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Hi, am Montag, 26. September 2005 23:26 schrieb Brooks Davis: > On Mon, Sep 26, 2005 at 11:04:36PM +0200, Frank J. Beckmann wrote: > > am Montag, 26. September 2005 22:53 schrieb Brooks Davis: > > > On Mon, Sep 26, 2005 at 10:27:44PM +0200, Frank J. Beckmann wrote: > > > > maybe this is a kind of stupid question, but what is the device gzero > > > > for? When should I use it instead of /dev/zero? > > > > > > It's to allow you to emulate a really big (41PB) fake disk for testing. > > > > Wow, that answer was fast... > > > > Sounds like an interesting device, but how do I use it? I guess I have to > > learn much about geom yet. > > Just load or compile in the module. A device will appear. Note that > such a device is only useful for testing since reads all return zeros > and writes are no-ops. I played a bit with it. It doesn't do much but it helps testing. Thank you. -- Frank
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