Date: Tue, 22 May 2012 08:40:56 -0600 (MDT) From: Warren Block <wblock@wonkity.com> To: Matthias Apitz <guru@unixarea.de> Cc: freebsd-hackers@freebsd.org Subject: Re: proper newfs options for SSD disk Message-ID: <alpine.BSF.2.00.1205220837500.51493@wonkity.com> In-Reply-To: <20120522134846.GA2274@tiny> 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> <20120522134846.GA2274@tiny>
next in thread | previous in thread | raw e-mail | index | archive | help
This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. ---902635197-698640261-1337697656=: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 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? :-) A bug in the design of MBR. Which probably can be forgiven, considering when it was created and the other problems with it. :) gpart's alignment option can be used with MBR slices and bsdlabel partitions. ---902635197-698640261-1337697656=:51493--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?alpine.BSF.2.00.1205220837500.51493>