From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hannes Reinecke Subject: Re: scsi negotiation problem on aic79xx (39320A) in 2.6.14 Date: Fri, 24 Mar 2006 13:30:22 +0100 Message-ID: <4423E65E.20005@suse.de> References: <20051114224512.GF9905@mathom.us> <20060323180909.GD15140@mathom.us> <1143139044.3415.26.camel@mulgrave.il.steeleye.com> <20060324122715.GG15140@mathom.us> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from mx2.suse.de ([195.135.220.15]:64700 "EHLO mx2.suse.de") by vger.kernel.org with ESMTP id S932145AbWCXMaY convert rfc822-to-8bit (ORCPT ); Fri, 24 Mar 2006 07:30:24 -0500 In-Reply-To: <20060324122715.GG15140@mathom.us> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Michael Stone Cc: linux-scsi@vger.kernel.org Michael Stone wrote: > On Thu, Mar 23, 2006 at 01:37:23PM -0500, James Bottomley wrote: >> Well, since the driver works normally for most people, it sounds lik= e >> there's some issue with this configuration. First of all, look >> in /sys/class/spi_transport/target2:0:0 and tell me what min_period, >> max_offset and max_width are. Then, if min_period is too high, echo >> 12.5 to it and 1 to revalidate. Finally, see if you can set the per= iod >> yourself using the period file. Also, what does /proc/scsi/aic79xx/= 2 >> say? If none of that works, we can try debug the negotiation. >=20 > Thanks for the reply, it's finally working. The min_period was 6.5, > changing it to 12.5 & revalidating made it properly negotiate 160MB/s > instead of asynchronous. max_offset was 254 & max_width was 1. Is the= re > a way to make that permenant beside setting the proc entries on each = boot? >=20 Well, yes. You can limit the transfer speed in the BIOS for that device= =2E With the latest patches from scsi-misc we're finally picking them up :-= ) Cheers, Hannes --=20 Dr. Hannes Reinecke hare@suse.de SuSE Linux Products GmbH S390 & zSeries Maxfeldstra=DFe 5 +49 911 74053 688 90409 N=FCrnberg http://www.suse.de - 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