USB DVD ... Again.

From: Wakko Warner
Date: Fri Dec 03 2004 - 12:22:06 EST


I'm about lost onthis one =)

----- Forwarded message from Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> -----

Date: Fri, 3 Dec 2004 10:22:43 -0500 (EST)
From: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
To: Wakko Warner <wakko@xxxxxxxxxxxx>
cc: linux-usb-devel@xxxxxxxxxxxxxxxxxxxxx
Subject: Re: [linux-usb-devel] FWD: Re: USB DVD

On Thu, 2 Dec 2004, Wakko Warner wrote:

> I have the debug information at
> http://veg.animx.eu.org/usb-storage.debug.dvd.txt
> It's around 190kb in size.
>
> ----- Forwarded message from Greg KH <greg@xxxxxxxxx> -----
>
> Date: Fri, 26 Nov 2004 19:28:17 -0800
> From: Greg KH <greg@xxxxxxxxx>
> To: linux-kernel@xxxxxxxxxxxxxxx
> Subject: Re: USB DVD
> X-Mailing-List: linux-kernel@xxxxxxxxxxxxxxx
>
> On Thu, Nov 25, 2004 at 10:03:13AM -0500, Wakko Warner wrote:
> > I have a USB DVD writer (I don't think the 'writer' part makes a difference)
> > that when I attempt to view a DVD Movie, it can't read some of the sectors
> > (DVD Auth I guess). The same drive internally on ide works. Is a problem
> > with USB or the enclosure?
>
> Odds are it's the enclosure :)
>
> But to be sure, can you enable CONFIG_USB_STORAGE_DEBUG and send the
> resulting log to the linux-usb-devel mailing list?

It's not a USB problem. The device is returning an error code with sense
key = 0x05 (Illegal Request) and ASC/ASCQ = 0x6f, 0x04 (I don't know what
those mean). Maybe someone who is familiar with the SCSI DVD protocol can
explain. However it's clear that the low-level USB transport is working
without errors.

Alan Stern


----- End forwarded message -----
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