From owner-freebsd-current@FreeBSD.ORG Mon Dec 6 17:17:06 2004 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 342A916A4CE for ; Mon, 6 Dec 2004 17:17:06 +0000 (GMT) Received: from kanga.honeypot.net (kanga.honeypot.net [208.162.254.122]) by mx1.FreeBSD.org (Postfix) with ESMTP id E9CC043D45 for ; Mon, 6 Dec 2004 17:17:05 +0000 (GMT) (envelope-from kirk@strauser.com) Received: from localhost (localhost [127.0.0.1]) by kanga.honeypot.net (Postfix) with ESMTP id 773F921D667 for ; Mon, 6 Dec 2004 11:17:05 -0600 (CST) Received: from kanga.honeypot.net ([127.0.0.1]) by localhost (kanga.honeypot.net [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 99340-10 for ; Mon, 6 Dec 2004 11:17:04 -0600 (CST) Received: from janus.daycos.com (janus.daycos.com [204.26.70.77]) (using TLSv1 with cipher RC4-MD5 (128/128 bits)) (No client certificate requested) by kanga.honeypot.net (Postfix) with ESMTP id B0BFE21D3B1 for ; Mon, 6 Dec 2004 11:17:04 -0600 (CST) From: Kirk Strauser To: freebsd-current@freebsd.org User-Agent: KMail/1.7.1 References: <20041206153223.GD4427@pleiades.aeternal.net> In-Reply-To: <20041206153223.GD4427@pleiades.aeternal.net> MIME-Version: 1.0 X-UID: 22 X-Length: 2632 Date: Mon, 6 Dec 2004 11:17:03 -0600 Content-Type: multipart/signed; boundary="nextPart1878733.tYijkakFvV"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Message-Id: <200412061117.03901.kirk@strauser.com> X-Virus-Scanned: by amavisd-new at honeypot.net Subject: Fixed my WRITE_DMA problems by removing vinum X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 06 Dec 2004 17:17:06 -0000 --nextPart1878733.tYijkakFvV Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline I recently became one of the growing number of users seeing WRITE_DMA-related panics on a regular basis any time I loaded down my system. I'd tried the workaround of running my main 120GB drive in PIO4 mode, but it was unbearably slow and the system crawled during large transfers. I'd been installing FreeBSD on vinum concat volumes for several years for the flexibility in allocating storage (want to grow /usr? Just tack another plex to the end and growfs it). However, I'd noticed that my storage requirements had pretty well stabilized over the last couple of years, and I decided to remove my vinum setup in favor of traditional partitions. When I did that, my WRITE_DMA problems disappeared completely under all circumstances that I've been able to test. I have been totally unable to panic my system (or get any kind of DMA warnings) since the migration. I'm not ready to completely blame vinum for destabilizing my ATA system - I wouldn't testify in court that I didn't inadvertently change any seemingly minor but actually important setting - but the circumstantial evidence seems pretty strong for me. =2D-=20 Kirk Strauser --nextPart1878733.tYijkakFvV Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- iD8DBQBBtJQP5sRg+Y0CpvERAg9XAJ0Q6I24YVPWzKXFasjD9VNDwQhBYwCffx5q TCSU+pXo28jYyDXihtIPBVg= =ETY2 -----END PGP SIGNATURE----- --nextPart1878733.tYijkakFvV--