Date: Mon, 21 Mar 2005 15:32:48 -0800 From: Julian Elischer <julian@elischer.org> To: Carlos Silva aka|Danger_Man| <full-disclosure@csilva.org> Cc: hackers <freebsd-hackers@freebsd.org> Subject: Re: USB 2.0 with bogus Data Rate Message-ID: <423F59A0.1080308@elischer.org> In-Reply-To: <423F5788.2070005@csilva.org> References: <423F5788.2070005@csilva.org>
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Carlos Silva aka|Danger_Man| wrote: > Hi hackers, > > I have a little problem with my external disk drive, my data transfer > rate is 1.000MB/s. > I have USB 2.0 so the rate is larger, right? > Somebody has an idea how to enlarge the rate? the data rate is bogus because it is printed by the scsi/cam code which doesn't know about USB speeds. This has been improved in 6.x and may flow back to 5.4.. in the meantime, ignore that number and use dd if=/dev/da0 of=/dev/null bs=64k to see what your rate really is.. > > Regards, > > Carlos > > > osiris# dmesg | grep usb && dmesg | grep da0 > usb0: <Intel 82371AB/EB (PIIX4) USB controller> on uhci0 > usb0: USB revision 1.0 > usb1: <VIA 83C572 USB controller> on uhci1 > usb1: USB revision 1.0 > usb2: <VIA 83C572 USB controller> on uhci2 > usb2: USB revision 1.0 > ehci_pci_attach: companion usb1 > ehci_pci_attach: companion usb2 > usb3: EHCI version 0.95 > usb3: companion controllers, 2 ports each: usb1 usb2 > usb3: <EHCI (generic) USB 2.0 controller> on ehci0 > usb3: USB revision 2.0 > GEOM: create disk da0 dp=0xc2d96850 > da0 at umass-sim0 bus 0 target 0 lun 0 > da0: <USB 2.0 Storage Device 0100> Fixed Direct Access SCSI-0 device > da0: 1.000MB/s transfers > da0: 190782MB (390721968 512 byte sectors: 255H 63S/T 24321C) > osiris# > > osiris# usbdevs > addr 1: UHCI root hub, Intel > addr 1: UHCI root hub, VIA > addr 1: UHCI root hub, VIA > addr 2: USB 2.0 Storage Device, Acer Labs > addr 1: EHCI root hub, (0x1106) > osiris# > > osiris# camcontrol devlist > <USB 2.0 Storage Device 0100> at scbus0 target 0 lun 0 (da0,pass0) > osiris# > > > > > > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to > "freebsd-hackers-unsubscribe@freebsd.org"
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