From owner-freebsd-bugs@FreeBSD.ORG Tue Mar 1 01:40:20 2005 Return-Path: Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 268FD16A4CE for ; Tue, 1 Mar 2005 01:40:20 +0000 (GMT) Received: from freefall.freebsd.org (freefall.freebsd.org [216.136.204.21]) by mx1.FreeBSD.org (Postfix) with ESMTP id DBE8B43D55 for ; Tue, 1 Mar 2005 01:40:19 +0000 (GMT) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1]) by freefall.freebsd.org (8.13.1/8.13.1) with ESMTP id j211eJPg024259 for ; Tue, 1 Mar 2005 01:40:19 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.13.1/8.13.1/Submit) id j211eJNl024258; Tue, 1 Mar 2005 01:40:19 GMT (envelope-from gnats) Date: Tue, 1 Mar 2005 01:40:19 GMT Message-Id: <200503010140.j211eJNl024258@freefall.freebsd.org> To: freebsd-bugs@FreeBSD.org From: "Jason Hitt" Subject: Re: kern/78216: WRITE_DMA UDMA ICRC errors while copying data to a disk X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: Jason Hitt List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 01 Mar 2005 01:40:20 -0000 The following reply was made to PR kern/78216; it has been noted by GNATS. From: "Jason Hitt" To: , Cc: Subject: Re: kern/78216: WRITE_DMA UDMA ICRC errors while copying data to a disk Date: Mon, 28 Feb 2005 19:36:28 -0600 This is a multi-part message in MIME format. ------=_NextPart_000_0002_01C51DCC.CC65BA80 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I tested both UDMA33 and UDMA66 modes on ad0 and ad2. My test consisted of the following: - cp -R of a 1 gigabyte directory to the same gmirror volume. - An FTP push of 1 gigabyte of data from another host. - An FTP pull of 1 gigabyte of data from another host. No DMA errors occurred at either UDMA33 or UDMA66. Attempting the same = test in UDMA100 mode almost immediately resulted in errors on ad0 and = caused gmirror to drop ad0 from the mirror volume. ------=_NextPart_000_0002_01C51DCC.CC65BA80 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
I tested both UDMA33 and UDMA66 modes = on ad0 and=20 ad2.
 
My test consisted of the = following:
    - cp -R of a 1 = gigabyte=20 directory to the same gmirror volume.
    - An FTP push of 1 = gigabyte of=20 data from another host.
    - An FTP pull of 1 = gigabyte of=20 data from another host.
 
No DMA errors occurred at either UDMA33 = or=20 UDMA66.  Attempting the same test in UDMA100 mode almost = immediately=20 resulted in errors on ad0 and caused gmirror to drop ad0 from the mirror = volume.
 
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