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DateWed, 20 Oct 2004 10:14:44 +0530
FromGanesan R <>
SubjectRe: [linux-usb-devel] Re: Linux 2.6.x wrongly recognizes USB 2.0 DVD writer (solved)
On Thu, Oct 14, 2004 at 10:26:53AM -0400, Alan Stern wrote:
> 
> On Thu, 14 Oct 2004, Ganesan R wrote:
> > 
> > I checked the kernel sources. Sure enough, 
> > drivers/usb/storage/unusual_devs.h
> > has a new entry in the 2.6 tree:
> > 
> > ========
> > /* <torsten.scherer@uni-bielefeld.de>: I don't know the name of the bridge
> >  * manufacturer, but I've got an external USB drive by the Revoltec company
> >  * that needs this. otherwise the drive is recognized as /dev/sda, but any
> >  * access to it blocks indefinitely.
> >  */
> > UNUSUAL_DEV(  0x0402, 0x5621, 0x0103, 0x0103,
> >         "Revoltec",
> >         "USB/IDE Bridge (ATA/ATAPI)",
> >         US_SC_DEVICE, US_PR_DEVICE, NULL, US_FL_FIX_INQUIRY),
> > ========
> > 
> > I have not yet tested after removing this entry, but this looks to be 
> > the likely problem. The enclosure actually supports both 3.5 IDE hard 
> > disks as well as 5.25 CD/DVD drives. I have no clue why this entry 
> > should cause the drive to be wrongly detected. CCing linux-usb-devel for 
> > help.
> 
> Certainly that entry is the problem.  It has been removed in the latest 
> development kernels; it may already be gone in 2.6.9-rc4.

I removed that entry and recompiled 2.6.8. The drive is now recognized
properly again in 2.6.8. Thanks to every one who helped.

Ganesan
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