From owner-freebsd-questions@FreeBSD.ORG Sat Nov 17 19:08:27 2012 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id EA810A58 for ; Sat, 17 Nov 2012 19:08:27 +0000 (UTC) (envelope-from illoai@gmail.com) Received: from mail-ie0-f182.google.com (mail-ie0-f182.google.com [209.85.223.182]) by mx1.freebsd.org (Postfix) with ESMTP id AD6748FC13 for ; Sat, 17 Nov 2012 19:08:27 +0000 (UTC) Received: by mail-ie0-f182.google.com with SMTP id k10so6618908iea.13 for ; Sat, 17 Nov 2012 11:08:27 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=fyC8rN3FPXeR8Ei8QGvb7qGof8UzRcewe2DDMgQg7Hk=; b=IKqFuXAVRn1qb9TxQZeDFBAFJrbBn74atSL8T8p4IzLqAy6Oqf4i6yR1StsnDLeW1M f6UeIZhOHjlSHzFJyjP3pRMnbwYW+KjYZwvgB0r77LVygPnrguiKNVOoU03hiyOBNUyX GIyJkyT3oXdfTxNmdXy1Wi1gAgiVVogrbxnClEskoFl8iy3xuPsofptzXoSUeMqnuIP+ zz7UJiE8krFcYHH0ODGlFMVVCyLiJI4qDjuzkEUY7JwlGcJzzuGp7DZIQFaZ1+fJxJmp TS80rF3Yg9oMXtgK6MmTs1+1Pgk3vvBx2QazI0QqEVP2Nac011slupNY0Efn38EK9nY4 ZdoA== MIME-Version: 1.0 Received: by 10.50.1.200 with SMTP id 8mr2517202igo.51.1353179307214; Sat, 17 Nov 2012 11:08:27 -0800 (PST) Received: by 10.64.30.11 with HTTP; Sat, 17 Nov 2012 11:08:26 -0800 (PST) In-Reply-To: References: Date: Sat, 17 Nov 2012 14:08:26 -0500 Message-ID: Subject: Re: FreeBSD on SSD on ASUS P5KPL-C From: "illoai@gmail.com" To: Snow Mountains Content-Type: text/plain; charset=ISO-8859-1 Cc: freebsd questions list X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 17 Nov 2012 19:08:28 -0000 On 17 November 2012 12:26, Snow Mountains wrote: > Hello, > > I'm about to upgrade hardware on my desktop and to install FreeBSD 9 > on it. I have ASUS P5KPL-C and want to buy a SSD or SATA-III 6Gb/s > drive for it. > > Please advise me: > > * does it make sense to buy SSD drive for a mb that supports 4x SATA > 3Gb/s (of couse, expecting a possible future mb upgrade)? > If you want SSD, by all means. For me the price/benefit ration is definitely not there. For you, perhaps different. > * if SSD is capable of working at greater speed, will it simply > operate on maximum 3Gb/s on P5KPL-C? > Yes, it will simply use the slower speed of the controller. > * the same question for SATA-III 6Gb/s. Will it simply operate on 3Gb on my mb? > Yes. > * How will FreeBSD 9 behave in such situations? Any special tweaking needed? > I wouldn't expect any special behaviour, though you need to take care with block alignment. Perhaps in the future FreeBSD will have a blocksize/erase-blocksize aware formatting & partitioning tool(s), but at the moment, you need to make sure those are correctly aligned if you want good performance from 4k blocksize drives (& SSDs will probably still need to be aligned to whatever the erase block size is). Good luck. -- --