The device may just be slow. If you aregetting more than 9Mbps then it isn't USB1 speeds.
On Sat, 25 Dec 2004, GCZ wrote: > Hello, > > I have a 128 MB SanDisk Cruzer Micro USB key, which is supposed to be > fully USB2 compliant. I can't, however, get more than "full speed" (12 > Mbps) access to it, even though the EHCI-HCD module does report that the > device is in "high speed" mode (480 Mbps). Timing the copy of large > files (50-100 MiB) shows that aproximately 11.9 Mbps is achieved. > > Here is an excerpt of /proc/bus/usb/devices: > > T: Bus=01 Lev=01 Prnt=01 Port=04 Cnt=01 Dev#= 3 Spd=480 MxCh= 0 > D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 > P: Vendor=0781 ProdID=7112 Rev=20.33 > S: Manufacturer=SanDisk Corp. > S: Product=Cruzer Micro > S: SerialNumber=0000009123 > C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=100mA > I: If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage > E: Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms > E: Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms > > And another excerpt from dmesg: > > usb 1-5: new high speed USB device using ehci_hcd and address 3 > scsi0 : SCSI emulation for USB Mass Storage devices > usb-storage: device found at 3 > usb-storage: waiting for device to settle before scanning > Vendor: SanDisk Model: Cruzer Micro Rev: 2033 > Type: Direct-Access ANSI SCSI revision: 00 > SCSI device sda: 256000 512-byte hdwr sectors (131 MB) > sda: assuming Write Enabled > sda: assuming drive cache: write through > > I have tried disabling OHCI-HCD and unplugging every other USB device, > with no success. I have noticed this issue with kernels 2.6.8.1, 2.6.9 > and 2.6.10 (released today), as well as with 2.4.x kernels (Knoppix 3.2, > Damn Small Linux 0.9.1). > > This is the only USB2 device I own, and I haven't had a chance to try it > on another machine yet. My motherboard is an Asus A7N8X Deluxe which is > also fully USB2 compliant. > > Is this a common issue? What could be wrong in my setup? > > -- /------------------------------------+-------------------------\ |Stephen J. Gowdy | SLAC, MailStop 34, | |http://www.slac.stanford.edu/~gowdy/ | 2575 Sand Hill Road, | |http://calendar.yahoo.com/gowdy | Menlo Park CA 94025, USA | |EMail: [EMAIL PROTECTED] | Tel: +1 650 926 3144 | \------------------------------------+-------------------------/ ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://productguide.itmanagersjournal.com/ _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
