From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yan Seiner Subject: Re: Backplane mystery Date: Fri, 27 Feb 2009 07:39:38 -0800 Message-ID: <49A8093A.1030401@seiner.com> References: <49A6B441.8010605@seiner.com> <49A6B683.9060806@rtr.ca> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from flatoutfitness.com ([66.178.130.209]:33616 "EHLO www.seiner.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755532AbZB0Pjl (ORCPT ); Fri, 27 Feb 2009 10:39:41 -0500 Received: from www.seiner.com ([192.168.128.6] ident=yan) by www.seiner.com with esmtp (Exim 4.69) (envelope-from ) id 1Ld4oM-0004Nn-TH for linux-ide@vger.kernel.org; Fri, 27 Feb 2009 07:39:38 -0800 In-Reply-To: <49A6B683.9060806@rtr.ca> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: linux-ide@vger.kernel.org Mark Lord wrote: > Yan Seiner wrote: >> I have an external enclosure with an SATA backplane with 20 drive >> slots. I am using 4 port multipliers to drive all 20 slots. >> >> One set of 5 slots connected to a single port multiplier always fails >> with >> ..... >> >> >> 02:00.0 Mass storage controller: Silicon Image, Inc. SiI 3132 Serial >> ATA Raid II Controller (rev 01) >> >> The system sees 3 port multipliers; not 4 as it should: >> >> [ 82.488354] ata4.15: Port Multiplier 1.1, 0x1095:0x3726 r23, 6 >> ports, feat 0x1/0x9 >> [ 82.488507] ata3.15: Port Multiplier 1.1, 0x1095:0x3726 r23, 6 >> ports, feat 0x1/0x9 >> [ 82.796408] ata1.15: Port Multiplier 1.1, 0x1095:0x3726 r23, 6 >> ports, feat 0x1/0x9 >> >> I suspect it's cabling length as the 5 "dead" slots are the farthest >> down the backplane but swapping cables randomly just doesn't seem >> like a good approach. >> >> What's my next step? > .. > > Perhaps try a different chipset controller card, > in hope that it will have stronger drive capability? OK, did that. No joy. [ 82.533526] ata3: SATA link up 1.5 Gbps (SStatus 113 SControl 310) [ 82.533606] ata3: link online but device misclassified, retrying [ 82.533686] ata3: reset failed (errno=-11), retrying in 9 secs Is there some way to be more forceful with the reset? I suspect one of the port multiplier boards is bad at this point. Is there some way to force a hard reset from user space? What can I from userspace short of hitting the thing with a hammer? --Yan -- o__ ,>/'_ o__ (_)\(_) ,>/'_ o__ Yan Seiner (_)\(_) ,>/'_ o__ Personal Trainer (_)\(_) ,>/'_ o__ Professional Engineer (_)\(_) ,>/'_ Who says engineers have to be pencil necked geeks? (_)\(_) I like paying taxes. With them I buy civilization.