Date: Mon, 24 Apr 2006 09:01:05 +0930 From: Greg 'groggy' Lehey <grog@FreeBSD.org> To: Poul-Henning Kamp <phk@phk.freebsd.dk> Cc: Jean-Yves Lefort <jylefort@FreeBSD.org>, freebsd-geom@FreeBSD.org Subject: Re: multiple of sector size I/O restriction Message-ID: <20060423233105.GK26969@wantadilla.lemis.com> In-Reply-To: <889.1145808650@critter.freebsd.dk> References: <20060423175605.35a26523.jylefort@FreeBSD.org> <889.1145808650@critter.freebsd.dk>
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--/rDaUNvWv5XYRSKj Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Sunday, 23 April 2006 at 18:10:50 +0200, Poul-Henning Kamp wrote: > In message <20060423175605.35a26523.jylefort@FreeBSD.org>, Jean-Yves Lefort writes: >> >> I've found some linux code which reads from a raw cd device in >> non-multiples of the sector size; I imagine that this code works on >> linux. This leads me to think that it is possible to overcome the >> hardware limitation by software means. Am I right? > > Yes, the linux kernel does not give access to the raw disks, you > always have to pass though their buffer cache. s/always // There are ways to bypass buffer cache in Linux. They're not pretty. Greg -- See complete headers for address and phone numbers. --/rDaUNvWv5XYRSKj Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (FreeBSD) iD8DBQFETA45IubykFB6QiMRAkc9AJsEjjVkpg2KM109UVTe9xQOABwQSACfdUmw INigZNYqC4afZ2AIPGF1BIk= =btYx -----END PGP SIGNATURE----- --/rDaUNvWv5XYRSKj--
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