Date: Sun, 22 Jul 2012 23:32:32 +0200 (CEST) From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl> To: Jakub Lach <jakub_lach@mailplus.pl> Cc: freebsd-questions@freebsd.org Subject: Re: "da0: 40.000MB/s transfers" What was rationale behind pegging USB 2.0 at 40MB/s? Message-ID: <alpine.BSF.2.00.1207222331130.4614@wojtek.tensor.gdynia.pl> In-Reply-To: <1342992043358-5729028.post@n5.nabble.com> References: <1342992043358-5729028.post@n5.nabble.com>
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> which actually works with FreeBSD just ripped from > package! (normal _empty_ FAT filesystem, no > garbageware added, no need to format). zero difference. newfs_msdos take a moment. > It actually bounces from 40MB/s limit when reading > from it. > > Writing is about 18MB/s. > > Device is supposed to be "467x" which should > be about 70MB/s. don't treat all advertised data seriously > > And USB 2.0 hard limit is 60MB/s. > > Wouldn't be nice to squeeze few additional > MB/s? how did you measured it. dd if=/dev/da0 of=/dev/null bs=64k ? dd if=/dev/zero of=/dev/da0 bs=64k via msdosfs via mtools ?
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