From owner-freebsd-scsi@FreeBSD.ORG Fri Oct 27 22:23:54 2006 Return-Path: X-Original-To: freebsd-scsi@freebsd.org Delivered-To: freebsd-scsi@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id B337616A403 for ; Fri, 27 Oct 2006 22:23:54 +0000 (UTC) (envelope-from asstec@matik.com.br) Received: from msrv.matik.com.br (msrv.matik.com.br [200.152.83.14]) by mx1.FreeBSD.org (Postfix) with ESMTP id EA96543D53 for ; Fri, 27 Oct 2006 22:23:53 +0000 (GMT) (envelope-from asstec@matik.com.br) Received: from ap-h.matik.com.br (ap-h.matik.com.br [200.152.83.36]) by msrv.matik.com.br (8.13.8/8.13.1) with ESMTP id k9RMNpex033298; Fri, 27 Oct 2006 19:23:51 -0300 (BRT) (envelope-from asstec@matik.com.br) From: AT Matik Organization: Infomatik To: freebsd-scsi@freebsd.org, "Kenneth D. Merry" Date: Fri, 27 Oct 2006 19:25:36 -0300 User-Agent: KMail/1.9.4 References: <20061027214011.GB86642@cons.org> <20061027220450.GA78909@nargothrond.kdm.org> In-Reply-To: <20061027220450.GA78909@nargothrond.kdm.org> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Message-Id: <200610271925.37069.asstec@matik.com.br> X-Virus-Scanned: ClamAV version 0.88.4, clamav-milter version 0.88.4 on msrv.matik.com.br X-Virus-Status: Clean Cc: Subject: Re: Why is SCSI so much faster with the write cache off (than ATA)? X-BeenThere: freebsd-scsi@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: SCSI subsystem List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 27 Oct 2006 22:23:54 -0000 On Friday 27 October 2006 19:04, Kenneth D. Merry wrote: > work well. =A0Is tagged queueing enabled on the ATA disks you're testing?= =A0Is > it the old-style queueing or NCQ? hi since it seems you're into this can you give further info how NCQ is relate= d=20 to the OS? how we can manage NCQ on OS level? Jo=E3o A mensagem foi scaneada pelo sistema de e-mail e pode ser considerada segura. Service fornecido pelo Datacenter Matik https://datacenter.matik.com.br