From owner-freebsd-scsi@FreeBSD.ORG Thu Aug 30 12:03:30 2007 Return-Path: Delivered-To: freebsd-scsi@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 820B816A468 for ; Thu, 30 Aug 2007 12:03:30 +0000 (UTC) (envelope-from lutierigbtrabalho@gmail.com) Received: from wr-out-0506.google.com (wr-out-0506.google.com [64.233.184.236]) by mx1.freebsd.org (Postfix) with ESMTP id 0E73E13C4B0 for ; Thu, 30 Aug 2007 12:03:29 +0000 (UTC) (envelope-from lutierigbtrabalho@gmail.com) Received: by wr-out-0506.google.com with SMTP id 70so298972wra for ; Thu, 30 Aug 2007 05:02:44 -0700 (PDT) DKIM-Signature: a=rsa-sha1; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=YqDigTau5U3UyrusZBkjfx4uM8FnlpapOHpxa/QrQlBbnQlJlP0OQPzz/UjWfWD7wQLl3nG24O7LPgOtuu4aVRfTA+It3KTWlbAO51qXqAdBpUo5fl+zBWAb/axEHM1gtyVsZATpURISFBBLsPLi/M6Mh6CW1AYwSfDgtjgR0JY= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=RsFZaPjqrKLkJ3Q5CF0JfugYtxHWfZVfH1KXGoRdHvHbJ2FO9zibH+RKu+652bAPY2ce5SpScNeQxMo9rvGZQzc6FMU+UxUkW7c7bVCjeI62OwmTpLaoPbkwNmKn1VstrGS+nAQwoIPQ/IdQNE+EM8QFxAuOmc5N7me3AKRzCHM= Received: by 10.142.215.5 with SMTP id n5mr19544wfg.1188475363919; Thu, 30 Aug 2007 05:02:43 -0700 (PDT) Received: by 10.142.101.15 with HTTP; Thu, 30 Aug 2007 05:02:43 -0700 (PDT) Message-ID: <71d0ebb0708300502x632fe83bo617f84ca2008dc7d@mail.gmail.com> Date: Thu, 30 Aug 2007 09:02:43 -0300 From: "Lutieri G." To: "Eric Anderson" In-Reply-To: <46D63710.1020103@freebsd.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <71d0ebb0708291245g79d2141fx73cc8a6e76875944@mail.gmail.com> <46D5E17F.3070403@samsco.org> <71d0ebb0708291416v17351c65u7ccc1b7bbe0271d2@mail.gmail.com> <46D5E5B1.207@samsco.org> <71d0ebb0708291506i49649a60l8006deafb20891ac@mail.gmail.com> <46D63710.1020103@freebsd.org> Cc: FREEBSD - SCSI - LIST Subject: Re: performance with LSI SAS 1064 X-BeenThere: freebsd-scsi@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: SCSI subsystem List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 30 Aug 2007 12:03:30 -0000 2007/8/30, Eric Anderson : > > I'm confused - you said in your first post you were getting 3MB/s, where > above you show something like 55MB/s. Sorry! using blogbench i got 3MB/s and 100% busy. Once is 100% busy i thinked that 3MB/s is the maximum speed. But i was wrong... > > You didn't say what kind of disks, or how many, the configuration, etc - > so it's hard to answer much. The 55MB/s seems pretty decent for many > hard drives in a sequential use state (which is what dd tests really). > SAS disks. Seagate, i don't know what is the right model of disks. Ok. If 55Mb/s is a decent speed i'm happy. I'm getting problems with squid cache and maybe should be a problem related with disks. But... i'm investigating and discharging problems. > Your errors before were probably caused because your queue depth is set > to 255 (or 256?) and the adapter can't do that many. You should use > camcontrol to reduce it, to maybe 32. See the camcontrol man page for > the right usage. It's something that needs setting on every boot, so a > startup file is a good place for it maybe. > Is there any way of get the right number to reduce?! > Eric -- Regards Lutieri G. B.