From owner-freebsd-bugs@FreeBSD.ORG Tue May 1 06:10:07 2007 Return-Path: X-Original-To: freebsd-bugs@hub.freebsd.org Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 33B8616A407 for ; Tue, 1 May 2007 06:10:07 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [69.147.83.40]) by mx1.freebsd.org (Postfix) with ESMTP id EDDC913C45D for ; Tue, 1 May 2007 06:10:06 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1]) by freefall.freebsd.org (8.13.4/8.13.4) with ESMTP id l416A61g079145 for ; Tue, 1 May 2007 06:10:06 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.13.4/8.13.4/Submit) id l416A6T0079144; Tue, 1 May 2007 06:10:06 GMT (envelope-from gnats) Resent-Date: Tue, 1 May 2007 06:10:06 GMT Resent-Message-Id: <200705010610.l416A6T0079144@freefall.freebsd.org> Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer) Resent-To: freebsd-bugs@FreeBSD.org Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org, "Alejandro Pulver" Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id D1CF216A401 for ; Tue, 1 May 2007 06:01:49 +0000 (UTC) (envelope-from alepulver@FreeBSD.org) Received: from relay02.pair.com (relay02.pair.com [209.68.5.16]) by mx1.freebsd.org (Postfix) with SMTP id 6F26C13C45A for ; Tue, 1 May 2007 06:01:49 +0000 (UTC) (envelope-from alepulver@FreeBSD.org) Received: (qmail 61925 invoked from network); 1 May 2007 06:01:47 -0000 Received: from 190.55.91.88 (HELO deimos.mars.bsd) (190.55.91.88) by relay02.pair.com with SMTP; 1 May 2007 06:01:47 -0000 Message-Id: <1177999317.1472@deimos.mars.bsd> Date: Tue, 1 May 2007 03:01:57 -0300 From: "Alejandro Pulver" To: "FreeBSD gnats submit" X-Send-Pr-Version: gtk-send-pr 0.4.8 Cc: Subject: kern/112282: atacontrol(8): changing DMA modes when disk is reading/writing crashes X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 01 May 2007 06:10:07 -0000 >Number: 112282 >Category: kern >Synopsis: atacontrol(8): changing DMA modes when disk is reading/writing crashes >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Tue May 01 06:10:06 GMT 2007 >Closed-Date: >Last-Modified: >Originator: Alejandro Pulver >Release: FreeBSD 6.2-RELEASE i386 >Organization: >Environment: System: FreeBSD 6.2-RELEASE #0: Fri Jan 12 11:05:30 UTC 2007 root@dessler.cse.buffalo.edu:/usr/obj/usr/src/sys/SMP >Description: I have a FreeBSD machine which changes ATA modes correctly when the disk is idle, but when it is reading/writing (moderate/high load) the system freezes after the command returns, and the disk light keeps on. The specifications of my machine are available here (the files containing "_1"; well, it has FreeBSD 6.2 now, not 6.1): http://people.freebsd.org/~alepulver/disk-crash.tar.bz2 If you need more information just ask me. >How-To-Repeat: For example (by default is in UDMA133): # atacontrol mode ad2 UDMA100 # atacontrol mode ad2 UDMA133 I could not reproduce the problem in my other machine which has a SATA disk and seems locked to the SATA300 mode (although one attempt to change it froze the system, keeping the disk light off; instead of rejecting the mode). This machine's specifications are in the files containing "_2" (see above). >Fix: None that I know. >Release-Note: >Audit-Trail: >Unformatted: