Subject: Re: kern/37403: USB tape drive Illegal Requests for any use
To: None <,,>
From: Jesse Peterson <>
List: netbsd-bugs
Date: 12/04/2007 07:20:03
The following reply was made to PR kern/37403; it has been noted by GNATS.

From: Jesse Peterson <>
Cc: Manuel Bouyer <>,,,
Subject: Re: kern/37403: USB tape drive Illegal Requests for any use
Date: Mon, 3 Dec 2007 23:19:05 -0800

 Can you expound on what is needed and this "code" is or point me to more information? I'd be interesting in finding a solution to this. I'm not sure what the "parameter list" is with regard to ASC/ASCQ and where in the source things related to this might be. I tried to turn on SCSIPI debugging unsuccessfully.
 I pulled the enclosure apart and found that the USB-to-ATA interface chip is an In-System/Cypress ISD300 ASIC. The 1394 400Mbps ports on the drive are driven by an Oxford OXF911 chip however I cannot use the firewire ports on this machine due to kern/37411.
 - Jesse
 On Sun,  2 Dec 2007 19:35:03 +0000 (UTC)
 Manuel Bouyer <> wrote:
 >  The problem here is that the drive appear as SCSI to the system, while it's
 >  really an ATAPI drive. A few things have to be handled differently between
 >  SCSI and ATAPI drives, and in your case the wrong code is used.
 >  I don't know how to handle it in the driver, as there's nothing to tell
 >  us here that it's an ATAPI device in an enclosure that makes it appear as
 >  SCSI. It would probably work if it was in an USB enclosure using the UFI
 >  or ATAPI protocol ...