On Fri, 21 Jan 2005, Paul Ortyl wrote:

> On Thu, Jan 20, 2005 at 06:07:26PM -0800, Matthew Dharm wrote:
> > Do you have CONFIG_BLK_DEV_UB turned on?
> > 
> > Matt
> 
> Yes! That was the problem... 
> I had CONFIG_BLK_DEV_UB as module configured, but not loaded, therefore 
> there was no driver for the harddrive.
> "CONFIG_BLK_DEV_UB=n" helps.
> 
> I do not understand only how could this not loaded module interfere with
> usb-storage...  [let this leave as a rethoric question...]

That's easy enough to explain.  When CONFIG_BLK_DEV_UB is set, the list of 
SubClasses and Protocols recognized by usb-storage is modified to omit 
devices using SCSI encapsulation and Bulk-Only transport.  Hence 
usb-storage no longer is associated with your hard disk -- regardless of 
whether the ub module is loaded or not.

I was confused by the fact that your DVD drive _did_ work.  Looking more 
closely, I see that it uses 8070i-ATAPI encapsulation rather than SCSI 
encapsulation.  That explains why it worked when the hard disk didn't.

Alan Stern



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