Date: Tue, 22 May 2012 15:48:47 +0200 From: Matthias Apitz <guru@unixarea.de> To: freebsd-hackers@freebsd.org Subject: Re: proper newfs options for SSD disk Message-ID: <20120522134846.GA2274@tiny> In-Reply-To: <alpine.BSF.2.00.1205220731070.51493@wonkity.com> References: <alpine.BSF.2.00.1205182209010.9350@wojtek.tensor.gdynia.pl> <4fb7dfd6.736a980a.186d.ffff902f@mx.google.com> <20120519180901.GA1264@tiny> <4fb7e819.6968700a.7a7f.ffff9153@mx.google.com> <20120522061734.GA1210@tiny> <alpine.BSF.2.00.1205220731070.51493@wonkity.com>
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El día Tuesday, May 22, 2012 a las 07:42:18AM -0600, Warren Block escribió: > 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 > > > > ... > > 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. But this is then rather a bug in fdisk(8) and not a PEBKAC, or? :-) matthias -- Matthias Apitz e <guru@unixarea.de> - w http://www.unixarea.de/ UNIX since V7 on PDP-11, UNIX on mainframe since ESER 1055 (IBM /370) UNIX on x86 since SVR4.2 UnixWare 2.1.2, FreeBSD since 2.2.5
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