The device is probably that speed (not that you'd get the full bandwidth in any case).
On Wed, 9 Feb 2005, Chris TenHarmsel wrote: > Hi all, > Here's my setup: > MSI KT6V motherboard with a VIA USB 2.0 controller. I have an AMD > Athlon XP 2800+ with 512 Mb of RAM. I'm running Gentoo, here's output > from 'uname -a': > > Linux pain 2.6.10-gentoo-r7 #1 Wed Feb 9 18:15:36 EST 2005 i686 AMD > Athlon(tm) XP 2800+ AuthenticAMD GNU/Linux > > Here's output from 'lsmod' (I currently have my ipod mounted with it's > USB cable, it's a 4G ipod, 20Gb, windows formatted): > > Module Size Used by > nvidia 3464924 12 > usb_storage 35584 1 > ndiswrapper 107732 0 > snd_via82xx 23072 1 > snd_ac97_codec 72608 1 snd_via82xx > gameport 3520 1 snd_via82xx > snd_mpu401_uart 6144 1 snd_via82xx > snd_rawmidi 20064 1 snd_mpu401_uart > ehci_hcd 27588 0 > joydev 8064 0 > evdev 7424 0 > usbhid 23232 0 > uhci_hcd 30160 0 > ohci1394 31428 0 > ieee1394 93748 1 ohci1394 > via_agp 7424 1 > agpgart 28200 2 via_agp > > Output from 'usbtree' (I have a USB keyboard with hub and a usb mouse): > > /: Bus 05.Port 1: Dev 1, Class=root_hub, Driver=ehci_hcd/8p, 480M > |__ Port 5: Dev 11, If 0, Class=stor., Driver=usb-storage, 480M > /: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M > /: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M > /: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M > /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M > |__ Port 1: Dev 4, If 0, Class=HID, Driver=usbhid, 1.5M > |__ Port 2: Dev 5, If 0, Class=hub, Driver=hub/3p, 12M > |__ Port 1: Dev 6, If 0, Class=HID, Driver=usbhid, 12M > |__ Port 1: Dev 6, If 1, Class=HID, Driver=usbhid, 12M > > Here's the usb-storage device from /proc/bus/usb/devices: > T: Bus=05 Lev=01 Prnt=01 Port=04 Cnt=01 Dev#= 11 Spd=480 MxCh= 0 > D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 > P: Vendor=05ac ProdID=1203 Rev= 0.01 > S: Manufacturer=Apple > S: Product=iPod > S: SerialNumber=00000096BC82 > C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr=500mA > I: If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage > E: Ad=82(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms > E: Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms > > Output from 3 back to back runs of 'hdparm -tT /dev/sdb': > First Run: > /dev/sdb: > Timing cached reads: 920 MB in 2.06 seconds = 447.54 MB/sec > Timing buffered disk reads: 44 MB in 3.12 seconds = 14.08 MB/sec > > Second Run: > /dev/sdb: > Timing cached reads: 1024 MB in 2.00 seconds = 511.06 MB/sec > Timing buffered disk reads: 44 MB in 3.11 seconds = 14.15 MB/sec > > Third Run: > /dev/sdb: > Timing cached reads: 772 MB in 2.01 seconds = 383.18 MB/sec > Timing buffered disk reads: 42 MB in 3.02 seconds = 13.91 MB/sec > > Timed copy of a ~100Mb file, three times in a row: > time cp vendetta-linux-installer.sh /mnt/ipod > > First: > real 0m18.846s > user 0m0.018s > sys 0m1.510s > > Second: > real 0m16.391s > user 0m0.025s > sys 0m1.526s > > Third: > real 0m15.343s > user 0m0.013s > sys 0m1.351s > > So, as far as I can tell, my transfer rate falls somewhere right > around 7MB/s for real files, and the reported 14MB/s from hdparm. > Neither of these numbers is really near the 480Mb/s (aprox 60MB/s > right?). > > I guess my question is, what's going on? Did I do something wrong? > Why am I not getting higher transfer rates? > > Thanks for any help you can offer, I really appreciate it. > > -Chris > > > ------------------------------------------------------- > 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://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click > _______________________________________________ > [email protected] > To unsubscribe, use the last form field at: > https://lists.sourceforge.net/lists/listinfo/linux-usb-users > -- /------------------------------------+-------------------------\ |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://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
