Date: Sun, 22 Jul 2012 14:56:56 -0700 (PDT) From: Jakub Lach <jakub_lach@mailplus.pl> To: freebsd-questions@freebsd.org Subject: Re: "da0: 40.000MB/s transfers" What was rationale behind pegging USB 2.0 at 40MB/s? Message-ID: <1342994216549-5729035.post@n5.nabble.com> In-Reply-To: <alpine.BSF.2.00.1207222331130.4614@wojtek.tensor.gdynia.pl> References: <1342992043358-5729028.post@n5.nabble.com> <alpine.BSF.2.00.1207222331130.4614@wojtek.tensor.gdynia.pl>
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18MB/s write is figure from few dd if=/dev/zero of=/dev/da0 bs=1 to 15M runs, 13-14MB/s from actual files copied in mc to flash and 36-39MB/s file copied from flash to hdd in mc. dd if=/dev/da0 of=/dev/zero bs=15m gives 33MB/s read. Speaking of advertisements, yes I know but USB 3.0 drives with nice flashes are capable of speeds well above 2.0 limits, and that's the point anyway. Speaking of formatting, I can't agree, as I bought such awfully formatted drive, that it had to be FAT formatted in Windows to be even recognized in FreeBSD as device. And I don't usually have Windows around. -- View this message in context: http://freebsd.1045724.n5.nabble.com/da0-40-000MB-s-transfers-What-was-rationale-behind-pegging-USB-2-0-at-40MB-s-tp5729028p5729035.html Sent from the freebsd-questions mailing list archive at Nabble.com.
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