Date: Mon, 27 Jan 2003 07:35:48 +0100 From: phk@freebsd.org To: Nate Lawson <nate@root.org> Cc: cvs-committers@freebsd.org, cvs-all@freebsd.org Subject: Re: cvs commit: src/sbin/disklabel disklabel.c Message-ID: <15853.1043649348@critter.freebsd.dk> In-Reply-To: Your message of "Sun, 26 Jan 2003 22:32:20 PST." <Pine.BSF.4.21.0301262230140.84307-100000@root.org>
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In message <Pine.BSF.4.21.0301262230140.84307-100000@root.org>, Nate Lawson wri tes: >On Sun, 26 Jan 2003 phk@freebsd.org wrote: >> Robert Watson writes: >> >We've always had a problem with ioctl's operating on storage devices >> >regardless of the open mode (and permitted access modes) for the devidce >> >nodes. >> >> And it ain't going to get any better as we get more weird "disks" >> in the GEOM framwork. > >I'm not sure why boot block/disk label writes can't be done as ordinary >writes and semantic checking performed by whichever GEOM layer thinks it >knows best about that portion of a disk. What is wrong with that >approach? It doesn't work without running a lot of special-case testing code, possibly several times, on each and every disk I/O request. Considering how often people update their bootblocks, this would be a totally unacceptable tradeoff. -- 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. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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