From owner-freebsd-stable@FreeBSD.ORG Fri May 14 23:58:36 2010 Return-Path: Delivered-To: freebsd-stable@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id C178C1065672 for ; Fri, 14 May 2010 23:58:36 +0000 (UTC) (envelope-from TERRY@tmk.com) Received: from server.tmk.com (server.tmk.com [204.141.35.63]) by mx1.freebsd.org (Postfix) with ESMTP id A0C168FC14 for ; Fri, 14 May 2010 23:58:36 +0000 (UTC) Received: from tmk.com by tmk.com (PMDF V6.4 #37010) id <01NN49MTRW7K006QOF@tmk.com> for freebsd-stable@FreeBSD.org; Fri, 14 May 2010 19:58:34 -0400 (EDT) Date: Fri, 14 May 2010 19:47:42 -0400 (EDT) From: Terry Kennedy To: freebsd-stable@FreeBSD.org Message-id: <01NN4A2NF0M4006QOF@tmk.com> MIME-version: 1.0 Content-type: TEXT/PLAIN; CHARSET=us-ascii Cc: Subject: RE: Read / write timeouts on SATA disks connected to ICH9 X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 14 May 2010 23:58:36 -0000 On Fri May 14 22:42:38 UTC 2010, Jeremy Chadwick wrote: > Finally, your vmstat -i output: > > > # vmstat -i > > interrupt total rate > > irq23: atapci0 371021299 10423 > > Good to know there's no IRQ sharing going on, but what does worry me is > the interrupt rate (10K interrupts/second). That seems *extremely* > high, but it also depends on what kind of disk I/O is happening on this > system -- especially since you have 2 disks attached to the same > controller. I have a bunch of R300's here. From one that is using the on-board SATA and 2 drives in a gmirror setup (very similar to the OP) after 18 hours of uptime: [0:2] speedtest:~> vmstat -i interrupt total rate irq23: atapci0 254116 3 I haven't specifically done any stress testing on this box, though I did do a "make -j8 buildworld" during the initial gmirror synchronization. 8-} The drives are a pair of Dell-labeled 160GB "SAMSUNG HE161HJ 1AC01121" that shipped with the box. I also have another R300 with Dell's "SAS 6/iR" card (a re-branded LSI 1068-something, seen as "mpt" by FreeBSD). While Dell only sells that as part of a package deal with the hot-swap backplane and redundant power supplies, there's no reason you couldn't pick one up on eBay and add it yourself. You'll need some sort of breakout cable to get from the big connector on the SAS 6 to individual SATA ports. Terry Kennedy http://www.tmk.com terry@tmk.com New York, NY USA