Date: Tue, 1 Mar 2005 01:40:19 GMT From: "Jason Hitt" <jhitt25@swbell.net> To: freebsd-bugs@FreeBSD.org Subject: Re: kern/78216: WRITE_DMA UDMA ICRC errors while copying data to a disk Message-ID: <200503010140.j211eJNl024258@freefall.freebsd.org>
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The following reply was made to PR kern/78216; it has been noted by GNATS. From: "Jason Hitt" <jhitt25@swbell.net> To: <freebsd-gnats-submit@FreeBSD.org>, <jhitt25@swbell.net> 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 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.2900.2604" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT face=3DArial size=3D2>I tested both UDMA33 and UDMA66 modes = on ad0 and=20 ad2.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>My test consisted of the = following:</FONT></DIV> <DIV><FONT face=3DArial size=3D2> - cp -R of a 1 = gigabyte=20 directory to the same gmirror volume.</FONT></DIV> <DIV><FONT face=3DArial size=3D2> - An FTP push of 1 = gigabyte of=20 data from another host.</FONT></DIV> <DIV><FONT face=3DArial size=3D2> - An FTP pull of 1 = gigabyte of=20 data from another host.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>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.</FONT></DIV> <DIV> </DIV></BODY></HTML> ------=_NextPart_000_0002_01C51DCC.CC65BA80--
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