From owner-freebsd-questions@FreeBSD.ORG Fri Nov 29 02:50:54 2013 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 3BED5634 for ; Fri, 29 Nov 2013 02:50:54 +0000 (UTC) Received: from mail-pb0-x22f.google.com (mail-pb0-x22f.google.com [IPv6:2607:f8b0:400e:c01::22f]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 0F75A1694 for ; Fri, 29 Nov 2013 02:50:54 +0000 (UTC) Received: by mail-pb0-f47.google.com with SMTP id um1so13602026pbc.34 for ; Thu, 28 Nov 2013 18:50:53 -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=YaT54TWSeq/ZTq1gA8kjYiL/SHd9O4H2iFIew7lg4dg=; b=lASJMiXkDmxGEdQ8lg7m2+cWAbMOlcQRHjxwgb3Qxp1pygfaDdfRVhxz7pmKnek6l4 B5cO6qn6D8d+ldRC4dWv8TwhMT5WNIDOiHiUJPFiVH6GiRzPZ0LFYkr27GfO/r2YU4wN Nbp/TClyp+7tZqSW+z/4r39Zi5sNRDrE8pE1ozXn+MQqcLYGyUsVaTTP0xSOy4ozKRz+ liCd0toV2iURnQSBEmodt7EMIdkDHmi49PJ/cV4PLvULZ3m5EQy6agyjLBS+peuXYyxm V/rzM49xKrtLp3aPc84DFzR1iyb7BXQK6mL8bO+9zV6xdZY3Dlolc5MrJz1iWyGt2Gu0 pIfA== MIME-Version: 1.0 X-Received: by 10.66.66.42 with SMTP id c10mr49605599pat.98.1385693453596; Thu, 28 Nov 2013 18:50:53 -0800 (PST) Received: by 10.70.92.79 with HTTP; Thu, 28 Nov 2013 18:50:53 -0800 (PST) In-Reply-To: References: Date: Thu, 28 Nov 2013 20:50:53 -0600 Message-ID: Subject: Re: 4k sectors From: Adam Vande More To: Warren Block Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.16 Cc: FreeBSD Questions X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.16 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 29 Nov 2013 02:50:54 -0000 On Thu, Nov 28, 2013 at 4:10 PM, Warren Block wrote: > On Thu, 28 Nov 2013, Adam Vande More wrote: > > Is there an easy method to find out the space wasted by using 4k vs 512? >> > > Which filesystem? UFS has block suballocation ("fragments"). It would be > surprising if ZFS did not, but I don't know what they call it. > UFS mainly although a FS agnostic tool would be best. Maybe another way to ask the question is there a tool that analyses a FS and suggests optimal defaults? Obviously this question can be answered with existing utilities and some math. I'm looking for the lazy man's solution. -- Adam