Date: Fri, 23 Jul 2010 17:12:35 -0700 From: perryh@pluto.rain.com To: holm@freibergnet.de Cc: freebsd-stable@freebsd.org Subject: Re: Floppy driver broken on 8.1-PRERELEASE? Message-ID: <4c4a2ff3.t5Wfu61In0E4%2BQtF%perryh@pluto.rain.com> In-Reply-To: <20100723101924.GB96573@pegasus.freiberg-net.de> References: <20100723101924.GB96573@pegasus.freiberg-net.de>
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Holm Tiffe <holm@freibergnet.de> wrote: > Why I can't read 1440K blocks from the floppy anymore? Perhaps something changed in the DMA driver, such that it is no longer able to handle a request exceeding 65K (which was the hardwired limit of the "original" PC DMA controller). I've long used bs=120b for floppies, and never had a problem. Why 120? # 120*512 = 61440, which is less than 65K. # For both 1.2MB and 1.44MB floppies, 120 sectors is a multiple of the track length.
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