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#
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