From owner-freebsd-current@FreeBSD.ORG Fri Dec 7 14:28:40 2012 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 01336DD6; Fri, 7 Dec 2012 14:28:39 +0000 (UTC) (envelope-from tomek.cedro@gmail.com) Received: from mail-lb0-f182.google.com (mail-lb0-f182.google.com [209.85.217.182]) by mx1.freebsd.org (Postfix) with ESMTP id 47FBB8FC08; Fri, 7 Dec 2012 14:28:39 +0000 (UTC) Received: by mail-lb0-f182.google.com with SMTP id go10so571942lbb.13 for ; Fri, 07 Dec 2012 06:28:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type; bh=9Hd5W28Hyg88xTtN89yw7C1r0+vW75xn0ra8xI82xY4=; b=MNWz3yxs2QPadT+PTlassGxSPysnGRUC86mmiFOKD9XZ309cr5TzEaBImBmsViAO9N Eh3oNzvsm8YJM3n1vTbJB2klTd+6LJLndzRpbFNVabDS/qUfElZPneMHFtiDpaCZVQQH m1entwzLerSeb+XMccdHaI4tOXX2br+LH0ZhYFpta66C1SD/IRQt88lMxyFHtizAuM/C 6RjDXh+vMwhTwYXhmy0gwJegZvBpOGMqefZ5NxXDljPubJS32qkHCthlbVBNE+o2jDNl x92iDWKuYUQ0eCHXEsIlKkK7e2YogHlCBiaJXYRxGxuC2192pFZUmnxg3SS/wmqdOk5M 0Lag== MIME-Version: 1.0 Received: by 10.112.44.2 with SMTP id a2mr2590847lbm.131.1354890518211; Fri, 07 Dec 2012 06:28:38 -0800 (PST) Sender: tomek.cedro@gmail.com Received: by 10.114.12.226 with HTTP; Fri, 7 Dec 2012 06:28:37 -0800 (PST) In-Reply-To: References: Date: Fri, 7 Dec 2012 15:28:37 +0100 X-Google-Sender-Auth: r3RIBXFRRE421GLB4nTbnYEXoo4 Message-ID: Subject: Re: UFS2 and Journaling in 9.1-RC3 From: CeDeROM To: Ivan Voras Content-Type: text/plain; charset=UTF-8 Cc: freebsd-current@freebsd.org X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 07 Dec 2012 14:28:40 -0000 On Fri, Dec 7, 2012 at 2:41 PM, Ivan Voras wrote: > It looks like you are confusing GEOM journalling (-J) and UFS-SU > journalling (-j). They are very different, and today you probably want > to use the latter. If you are installing 9.x from scratch, it will be > enabled by default. If not, you can use newfs -j or tunefs -j to enable it. "When any other means fail, read the manual" heh :-) I am still a bit confused, even after reading [1], because there is no explanation of difference between GJournal and SU / SU+J (which was introduced in FreeBSD 9.0). I understand GJournal works below filesystem level and I dont need to use fsck. SU/SU+J is part of the UDF/UDF2 filesystem. I should not use SU and GJournal at the same time. What are the advantages of SU/US+J? What is the advantage of SU+J over SU? Should I use Gjournal or SU/SU+J? Any hints welcome! :-) If I have already created UFS2 with -J, I understand I can switch it off, can I then simply turn of UFS+J (-j) with no data loss on existing filesystem? Which solution is better for drives >1TB when I dont want to wait an hour for fsck? [1] http://www.freebsd.org/doc/en_US.ISO8859-1/articles/gjournal-desktop/index.html Thanks! :-) Tomek -- CeDeROM, SQ7MHZ, http://www.tomek.cedro.info