Date: Tue, 15 Jun 2004 07:38:42 +0200 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: Gordon Tetlow <gordon@freebsd.org> Cc: geom@freebsd.org Subject: Re: GEOM class idea... Message-ID: <99981.1087277922@critter.freebsd.dk> In-Reply-To: Your message of "Mon, 14 Jun 2004 15:09:31 PDT." <20040614220931.GR10016@spiff.melthusia.org>
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In message <20040614220931.GR10016@spiff.melthusia.org>, Gordon Tetlow writes: >> Many of us read CD's into iso images, stick them on a harddisk and >> mount them from there when we need to access them. This usually >> costs us a md(4) vnode gadget, and that is really a waste. > >=2E.. description of grotty geom class ... > >I can't imagine that all the pain that you are talking about is a >worthwhile effort when it's so easy to do a md backed file. I can >just about guarentee that users will have spare files and capacity >before they have a spare disk running around. > >Maybe I'm missing something here, but what is the advantage of >going straight off of the disk? Are you trying to avoid the FFS >filesystem overhead? You would save both the md and ffs overhead and gain about 10% disk capacity in the process. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.
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