From owner-freebsd-stable Fri Jan 10 6: 5:21 2003 Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id B3B7037B401 for ; Fri, 10 Jan 2003 06:05:20 -0800 (PST) Received: from subnet.sub.net (subnet.sub.net [193.197.184.21]) by mx1.FreeBSD.org (Postfix) with ESMTP id 3ED0B43F43 for ; Fri, 10 Jan 2003 06:05:19 -0800 (PST) (envelope-from wolfgang@lyxys.ka.sub.org) Received: from subnet.sub.net (uucp@localhost [127.0.0.1]) by subnet.sub.net (8.12.6/8.12.6/subnet-freebsd-1.0) with ESMTP id h0AE5AB6010223; Fri, 10 Jan 2003 15:05:10 +0100 (CET) (envelope-from wolfgang@lyxys.ka.sub.org) Received: from lyxys.ka.sub.org (uucp@localhost) by subnet.sub.net (8.12.6/8.12.6/Submit) with bsmtp id h0AE59b4010212; Fri, 10 Jan 2003 15:05:09 +0100 (CET) Received: from localhost (1223 bytes) by lyxys.ka.sub.org via sendmail with P:stdio/R:smart_host/T:inet_uusmtp (sender: ) (ident using unix) id for ; Fri, 10 Jan 2003 14:50:43 +0100 (CET) (Smail-3.2.0.111 2000-Feb-17 #1 built 2000-Aug-23) Message-Id: From: wolfgang@lyxys.ka.sub.org (Wolfgang Zenker) Subject: Re: ATA corruption in DMA mode In-Reply-To: <3E1D08CE.D5E79563@cox.net> To: Janet Sullivan Date: Fri, 10 Jan 2003 14:50:43 +0100 (CET) Cc: Mike Tancsa , freebsd-stable@FreeBSD.ORG X-Mailer: ELM [version 2.4ME+ PL99b (25)] MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG > Janet Sullivan wrote: > [..] > I broke the mirror and tested each drive separately on the HPT > controller in DMA mode - there were no problems. I recreated the mirror > and the corruption of large files came back. The problem only occurs > when the two drives are in a RAID1 array on the HPT controller and DMA > is enabled. I would think that if this was a hardware problem, one of > the two drives in the RAID1 array would have had some corruption > problems when it was taken out of the array and addressed as a single > drive. Suggestions? It could be a problem with your power supply: in mirror mode both drives are active at the same time. You could try to give one drive some constant work while you test the other drive. Wolfgang To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message