USB Disk Speed

[david.rosenstrauch at csfb.com (Rosenstrauch, David)]

> On Fri, Sep 30, 2005 at 12:31:08PM -0400, dsr at tao.merseine.nu wrote:
> > Look at the difference between lsmod on Knoppix and Ubuntu. Does
> > Ubuntu load ehci_hcd and Knoppix not do so? If so, then Knoppix
> > needs a modprobe ehci_hcd and a replugging of the USB drive.
> 
> Ubuntu does indeed have ehci_hcd.  Let me check Knoppix...
> 
> This time Knoppix gives me disk icons, last time it gave me thumb
> drive icons.  And this time I am at 0.75 MB/s.
> 
> On to lsmod and friends: No, there seems to be no ehci_hcd anywhere on
> this machine.  The "find" utility seems to return too quickly, but
> modprobe hasn't heard of it.


FYI, the module is actually named "ehci-hcd".  (Note the difference between dash ("-") and underbar ("_").)  Modprobe is agnostic about dash vs. underbar (you can use either one), but (obviously) a file system find is not.

Try looking again.  You should be able to find the module (if it exists) in approximately this location:

/lib/modules/$(uname -r)/kernel/drivers/usb/host/

DR

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