From owner-freebsd-bugs@FreeBSD.ORG Mon Oct 18 12:20:33 2004 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 22BE516A4CE for ; Mon, 18 Oct 2004 12:20:33 +0000 (GMT) Received: from freefall.freebsd.org (freefall.freebsd.org [216.136.204.21]) by mx1.FreeBSD.org (Postfix) with ESMTP id 0FFE443D2D for ; Mon, 18 Oct 2004 12:20:33 +0000 (GMT) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1]) by freefall.freebsd.org (8.12.11/8.12.11) with ESMTP id i9ICKWRb061400 for ; Mon, 18 Oct 2004 12:20:32 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.12.11/8.12.11/Submit) id i9ICKWX1061399; Mon, 18 Oct 2004 12:20:32 GMT (envelope-from gnats) Date: Mon, 18 Oct 2004 12:20:32 GMT Message-Id: <200410181220.i9ICKWX1061399@freefall.freebsd.org> To: freebsd-bugs@FreeBSD.org From: "Kipp Holger" Subject: Re: kern/72116: tagged queueing broken on quantum Atlas10K3 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: Kipp Holger List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 18 Oct 2004 12:20:33 -0000 The following reply was made to PR kern/72116; it has been noted by GNATS. From: "Kipp Holger" To: Cc: Subject: Re: kern/72116: tagged queueing broken on quantum Atlas10K3 Date: Mon, 18 Oct 2004 13:14:03 +0200 This is a multi-part message in MIME format. ------_=_NextPart_001_01C4B503.93516C41 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Problem solved. One of the three disks in use (brand new) had a very strange caching and therefore timing/performance behaviour during write operations. Write performance was 'oscillating' between 0 (zero) and maximum. Disk will be replaced. Sorry for the noise. Holger Kipp ------_=_NextPart_001_01C4B503.93516C41 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Re: kern/72116: tagged queueing broken on quantum = Atlas10K3

Problem solved.

One of the three disks in use (brand new) had a very strange caching
and therefore timing/performance behaviour during write operations.
Write performance was 'oscillating' between 0 (zero) and maximum.

Disk will be replaced. Sorry for the noise.

Holger Kipp

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