From owner-freebsd-stable@FreeBSD.ORG Wed Nov 19 15:07:06 2014 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 660DFE95 for ; Wed, 19 Nov 2014 15:07:06 +0000 (UTC) Received: from mail.ijs.si (mail.ijs.si [IPv6:2001:1470:ff80::25]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 138142D8 for ; Wed, 19 Nov 2014 15:07:06 +0000 (UTC) Received: from amavis-proxy-ori.ijs.si (localhost [IPv6:::1]) by mail.ijs.si (Postfix) with ESMTP id 3jjS6b4PrjzJl for ; Wed, 19 Nov 2014 16:07:03 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ijs.si; h= user-agent:message-id:references:in-reply-to:organization :subject:subject:from:from:date:date:content-transfer-encoding :content-type:content-type:mime-version:received:received :received:received; s=jakla4; t=1416409613; x=1419001614; bh=ng/ Xt7YyLKLvyIkCje1w+R2GkpMbTFiEIgqz6Cl6u1s=; b=F/jjyL++dwnMiK7B3JF Aq965GV7kcAq8hE/P+5hkV4VlwFtALQOXQKjbuWATThFh0Niu9JqKNxeoeo6X+k7 BQlMqfX2AAWc6yDBDBUYsdGRJ1lQDTS5WgPMbS67gFZNBeo9mfWqIffs+ciwq/o6 ab36Lq1jygVnwyQgFnXuU7+Y= X-Virus-Scanned: amavisd-new at ijs.si Received: from mail.ijs.si ([IPv6:::1]) by amavis-proxy-ori.ijs.si (mail.ijs.si [IPv6:::1]) (amavisd-new, port 10012) with ESMTP id 9tvg98eWy8EB for ; Wed, 19 Nov 2014 16:06:53 +0100 (CET) Received: from mildred.ijs.si (mailbox.ijs.si [IPv6:2001:1470:ff80::143:1]) by mail.ijs.si (Postfix) with ESMTP for ; Wed, 19 Nov 2014 16:06:51 +0100 (CET) Received: from neli.ijs.si (neli.ijs.si [IPv6:2001:1470:ff80:88:21c:c0ff:feb1:8c91]) by mildred.ijs.si (Postfix) with ESMTP id 3jjS6M6qfrzL4 for ; Wed, 19 Nov 2014 16:06:51 +0100 (CET) Received: from neli.ijs.si ([2001:1470:ff80:88:21c:c0ff:feb1:8c91]) by neli.ijs.si with HTTP (HTTP/1.1 POST); Wed, 19 Nov 2014 16:06:51 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Date: Wed, 19 Nov 2014 16:06:51 +0100 From: Mark Martinec To: freebsd-stable@freebsd.org Subject: Re: 10.1 fresh install and 4k alignment Organization: J. Stefan Institute In-Reply-To: <1D6C7C39-C8F6-4F5B-AF09-F26B27FA2ED0@punkt.de> References: <27d8222a2b617ac515c38a0023151320@mailbox.ijs.si> <1D6C7C39-C8F6-4F5B-AF09-F26B27FA2ED0@punkt.de> Message-ID: X-Sender: Mark.Martinec+freebsd@ijs.si User-Agent: Roundcube Webmail/1.0.3 X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 19 Nov 2014 15:07:06 -0000 >> Am 19.11.2014 um 15:50 schrieb Mark Martinec >> : >> >> I consider a sensible alignment nowadays to be '-a 1m' for any >> GPT partition, including freebsd-boot. If one is very short on space >> and not on an SSD, one may save 0.5 MB by aligning freebsd-boot >> on -a 512k and everything else on '-a 1m': Patrick M. Hausen wrote: > Why the "not on an SSD" condition? Because an SSD erase block is typically 1 MB in size, and it's not desirable to let it shuffle around blocks holding a boot partition when managing some unrelated space that happens to be in the same 1 MB region. Mark Btw: "The Windows Disk Manager in Windows Vista and Windows 7 utilizes a new 1 MB partition alignment scheme" [1] [1] http://en.wikipedia.org/wiki/Disk_partitioning#DOS.2C_Windows.2C_and_OS.2F2