Date: Sat, 8 Jan 2005 13:47:36 -0800 (PST) From: Arne "Wörner" <arne_woerner@yahoo.com> To: Paul Hoffman <phoffman@proper.com>, freebsd-usb@freebsd.org Subject: Re: Getting USB2 on FreeBSD 5.3? Message-ID: <20050108214736.39208.qmail@web41207.mail.yahoo.com> In-Reply-To: <p06200727be05ff8ca115@[10.20.30.249]>
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> da0 at umass-sim0 bus 0 target 0 lun 0 > da0: <ST312002 6A 3.04> Fixed Direct Access SCSI-0 device > da0: 1.000MB/s transfers > I thought, USB1.1 can do 1.5Mbytes/sec and USB2 can do 480Mbit/sec (I read it in advertisements for USB devices). Why does da0 say, that it can do just 1MBytes/sec? > [[ I replied: > Actually, it helps some. I am seeing similar results (well, 7.1 > MB/s), so this is a bit heartening. But it doesn't explain why > we're not seeing the 50 MB/s we're supposed to be seeing. ]] > 480/8 is 60, isn't it? So we should see 60 MB/s, or is it just marketing talk? I like it, when FreeBSD is nearly as fast as possible (several years ago some FreeBSD NIC drivers were quite efficient). I am wondering, why my USB1.1 Cytronix SmartMedia card reader does not more than 1MBytes/sec... I just wanted to point out some little aspects of the problem... -Arne __________________________________ Do you Yahoo!? Yahoo! Mail - Easier than ever with enhanced search. Learn more. http://info.mail.yahoo.com/mail_250home | help
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