From mboxrd@z Thu Jan 1 00:00:00 1970 From: Zoltan HERPAI Subject: LSI 53c1030 speed issue Date: Thu, 13 Jul 2006 00:40:06 +0200 Message-ID: <44B57A46.80804@uid0.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from postahivatal.bpcl.broadband.hu ([195.184.181.19]:19943 "EHLO postahivatal.bpcl.broadband.hu") by vger.kernel.org with ESMTP id S932353AbWGLWkI (ORCPT ); Wed, 12 Jul 2006 18:40:08 -0400 Received: from [10.1.1.20] (dsl195-38-112-166.pool.tvnet.hu [195.38.112.166]) by postahivatal.bpcl.broadband.hu (Postfix) with ESMTP id 8738F200389 for ; Thu, 13 Jul 2006 00:40:09 +0200 (CEST) Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: linux-scsi@vger.kernel.org Hello, I've recently acquired a Promise VTrak 8110 (3x250Gb in RAID5) with an LSI 53c1030 card. The configuration was tested on a desktop machine (AMD 2500+, standard 32/33 PCI) and reached about 30-40MB/sec. I installed the card into a Sun X4100 (4 CPU, 4Gb mem, 64/133 PCI-X) with the storage behind it, and got surprised that the maximum speed of the card in the box topped at 3-3.5MB/sec, with a load of 5, vmstat shows a constant 50% iowait, filesystem is ext3, some debug info is below. It might be interesting that the box has an LSI SAS1064 controller onboard. Does anyone have an idea what am I doing wrong? # lspci -vvv 0000:06:01.0 SCSI storage controller: LSI Logic / Symbios Logic 53c1030 PCI-X Fusion-MPT Dual Ultra320 SCSI (rev 08) Subsystem: LSI Logic / Symbios Logic: Unknown device 1060 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR+ FastB2B- Status: Cap+ 66MHz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- SERR-