From owner-freebsd-hackers@FreeBSD.ORG Tue May 22 13:42:19 2012 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id DC65B106566B for ; Tue, 22 May 2012 13:42:19 +0000 (UTC) (envelope-from wblock@wonkity.com) Received: from wonkity.com (wonkity.com [67.158.26.137]) by mx1.freebsd.org (Postfix) with ESMTP id 92DDF8FC08 for ; Tue, 22 May 2012 13:42:19 +0000 (UTC) Received: from wonkity.com (localhost [127.0.0.1]) by wonkity.com (8.14.5/8.14.5) with ESMTP id q4MDgIYr051678; Tue, 22 May 2012 07:42:18 -0600 (MDT) (envelope-from wblock@wonkity.com) Received: from localhost (wblock@localhost) by wonkity.com (8.14.5/8.14.5/Submit) with ESMTP id q4MDgID5051675; Tue, 22 May 2012 07:42:18 -0600 (MDT) (envelope-from wblock@wonkity.com) Date: Tue, 22 May 2012 07:42:18 -0600 (MDT) From: Warren Block To: Matthias Apitz In-Reply-To: <20120522061734.GA1210@tiny> Message-ID: References: <4fb7dfd6.736a980a.186d.ffff902f@mx.google.com> <20120519180901.GA1264@tiny> <4fb7e819.6968700a.7a7f.ffff9153@mx.google.com> <20120522061734.GA1210@tiny> User-Agent: Alpine 2.00 (BSF 1167 2008-08-23) MIME-Version: 1.0 Content-Type: MULTIPART/MIXED; BOUNDARY="-902635197-248074046-1337694138=:51493" X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.7 (wonkity.com [127.0.0.1]); Tue, 22 May 2012 07:42:18 -0600 (MDT) Cc: 'User Wojtek' , rozhuk.im@gmail.com, freebsd-hackers@freebsd.org Subject: Re: proper newfs options for SSD disk X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 22 May 2012 13:42:19 -0000 This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. ---902635197-248074046-1337694138=:51493 Content-Type: TEXT/PLAIN; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8BIT On Tue, 22 May 2012, Matthias Apitz wrote: > El día Sunday, May 20, 2012 a las 03:36:01AM +0900, rozhuk.im@gmail.com escribió: >> >> Do not use MBR (or manually do all to align). >> 63 - not 4k aligned. > > To create the above shown partition layout I have not used gpart(8); I > just said: > > # fdisk -I /dev/ada0 > # fdisk -B /dev/ada0 > > # bsdlabel -w ada0s1 auto > # bsdlabel -B ada0s1 > > changed partition "a" from "unused" to "4.2BSD" as partition type: > > # setenv EDITOR /usr/bin/vi > # bsdlabel -e ada0s1 > > created the future root-filesystem on it > > # newfs -m 0 -o space /dev/ada0s1a > > The 2nd SSD was formated like this: > > # dd if=/dev/zero of=/dev/ada1 count=2 > # fdisk -I /dev/ada1 > # newfs -m 0 -o space /dev/ada1s1a > # echo "/dev/ada1s1a /usr/local ufs rw,noatime 1 1" >> /etc/fstab > # mount /usr/local > > What is wrong with this procedure? The filesystem partitions end up at locations that aren't even multiples of 4K. This can reduce performance. How much probably depends on the SSD. ---902635197-248074046-1337694138=:51493--