From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gustavo Guillermo =?iso-8859-1?q?P=E9rez?= Subject: Re: SCSI trow USB-STORAGE or SBP2 Debug for buggy device Kernels 2.6.X Date: Tue, 25 Apr 2006 16:41:53 -0500 Message-ID: <200604251641.54084.gustavo@compunauta.com> References: <200604241029.14932.gustavo@compunauta.com> <200604241712.26445.gustavo@compunauta.com> <444DBD0D.9010309@s5r6.in-berlin.de> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from compunauta.com ([69.36.170.169]:14509 "EHLO compunauta.com") by vger.kernel.org with ESMTP id S1751625AbWDYVmF convert rfc822-to-8bit (ORCPT ); Tue, 25 Apr 2006 17:42:05 -0400 In-Reply-To: <444DBD0D.9010309@s5r6.in-berlin.de> Content-Disposition: inline Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Stefan Richter , James Bottomley , Andrew Morton , linux-scsi@vger.kernel.org El Martes, 25 de Abril de 2006 01:09, escribi=F3: > Gustavo Guillermo P=E9rez wrote: > > El Lunes, 24 de Abril de 2006 17:02, James Bottomley escribi=F3: > >>So, I could change the long write in progress to a retry. However,= I > >>suspect the reason we got that return is because this device is unt= agged > >>(doesn't accept multiple commands at once) and perhaps a better fix > >>might be to reduce the queue depth down to one to prevent more than= one > >>command being outstanding at any one time. > > > > It would not be better to include some handling on the black list? = it > > means doing a new BLACK_CONST to handle just this special case?. > > For now you can and should test a queue depth of one via sbp2: > # modprobe sbp2 serialize_io=3D1 > > But isn't usb-storage's queue depth already 1? Yes, I was tested it cause driver said something about this option, the= n I was=20 checked the option 1 or 0, same result. > Dou you use all the different Pioneer drives with the same > IDE/USB+FireWire bridge or do you have different bridges? Yes I have 3 diferent bridges, with 5 diferent DVDRW from pioneer other= Drives=20 I've tested with this same USB-IDE Bridges works without this problem. I've tried the flag BLACK_XXX for non tagged queue for this drive but w= ith no=20 results. {"PIONEER", "DVD-RW DVR-110D", NULL, BLIST_RETRY_HWERROR | BLIST_NOTQ} :S --=20 Gustavo Guillermo P=E9rez Compunauta uLinux www.compunauta.com - To unsubscribe from this list: send the line "unsubscribe linux-scsi" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html