From mboxrd@z Thu Jan 1 00:00:00 1970 From: Erich Weiler Subject: Re: SCSI disk IO problem with JBOD Date: Tue, 31 Jul 2012 22:31:24 -0700 Message-ID: <5018BF2C.1050608@soe.ucsc.edu> References: <5018A9EF.2080003@soe.ucsc.edu> <5018BA91.3000506@hardwarefreak.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail-pb0-f46.google.com ([209.85.160.46]:63102 "EHLO mail-pb0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751902Ab2HAFb1 (ORCPT ); Wed, 1 Aug 2012 01:31:27 -0400 Received: by pbbrp8 with SMTP id rp8so512214pbb.19 for ; Tue, 31 Jul 2012 22:31:27 -0700 (PDT) In-Reply-To: <5018BA91.3000506@hardwarefreak.com> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: stan@hardwarefreak.com Cc: linux-scsi@vger.kernel.org Hi Stan, Thanks for replying! >> We have a Dell R610 server running CentOS 6.3 (kernel >> 2.6.32-279.2.1.el6.x86_64). We installed a LSI 9201-16e SAS HBA in it, >> upgraded to the latest firmware (9116 chipset). Then we attached a LSI >> DE2660 JBOD array to it, with 60 hard drives. > > TTBOMK LSI never made a 60 drive JBOD chassis. Is this actually 3x 24 > bay JBOD chassis daisy chained? Did you buy them on Ebay or are these > simply being redeployed? All LSI drive chassis, both JBOD and SAN/DAS > RAID, have been discontinued for quite a while. Technically it is a E2660 Engenio "expansion" Array. These arrays are indeed 60 disks (in 4RU), they are front loading with 5 12-disk "trays" connected to a common backplane. NetApp recently acquired the LSI Engenio division, so I guess really it isn't LSI anymore, but now NetApp. It was purchased like 4 months ago right before NetApp took over the group. > First remove and re-seat all SFF8088 cables. Then replace them one by > one until the errors/problems are eliminated. If not test each chassis > expander module individually with only one in the chassis. Test it in > both module bays. Basic process of elimination stuff. I've not tried it with only one expander in the chassis, good idea. > Given you're receiving errors on multiple drives I'd say you have a bad: > > 1. Cable > 2. Backplane > 3. Expander module > 4. PSU Yeah something is weird, I seem to be receiving errors on every single drive. Either it's a driver issue or maybe even with the HBA, or something weird with the array/backplane. Thanks for the reply! cheers, erich