From owner-freebsd-scsi Fri Nov 3 7:29:26 2000 Delivered-To: freebsd-scsi@freebsd.org Received: from thelab.hub.org (CDR20-53.accesscable.net [24.138.20.53]) by hub.freebsd.org (Postfix) with ESMTP id 21DA337B4D7 for ; Fri, 3 Nov 2000 07:29:24 -0800 (PST) Received: from localhost (scrappy@localhost) by thelab.hub.org (8.11.1/8.11.1) with ESMTP id eA3FRYL64876; Fri, 3 Nov 2000 11:27:34 -0400 (AST) (envelope-from scrappy@hub.org) X-Authentication-Warning: thelab.hub.org: scrappy owned process doing -bs Date: Fri, 3 Nov 2000 11:27:34 -0400 (AST) From: The Hermit Hacker To: "Justin T. Gibbs" Cc: Tom Samplonius , freebsd-scsi@FreeBSD.ORG Subject: Re: iostat: tps for SCSI drives ... In-Reply-To: <200011030519.eA35Jma93066@aslan.scsiguy.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Cool ... thanks all for the patience and explanations ... On Thu, 2 Nov 2000, Justin T. Gibbs wrote: > >I imagine this would have to be "on the drive", but can they feed back > >information for Cmd6->Cmd7 while its processing Cmd0->Cmd5? Or is it > >purely FIFO? > > That is exactly the point. The drive does not have to handle the > transactions in FIFO order unless you specificly tell it to. You > can do this on a per-command basis: re-order any way that is convenient, > ensure all transactions queued prior to this command complete prior to > its execution, or place this transaction at the head of the queue. > > -- > Justin > > Marc G. Fournier ICQ#7615664 IRC Nick: Scrappy Systems Administrator @ hub.org primary: scrappy@hub.org secondary: scrappy@{freebsd|postgresql}.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message