From owner-freebsd-questions@FreeBSD.ORG Thu Nov 20 20:10:19 2008 Return-Path: Delivered-To: questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 42F091065673 for ; Thu, 20 Nov 2008 20:10:19 +0000 (UTC) (envelope-from wojtek@wojtek.tensor.gdynia.pl) Received: from wojtek.tensor.gdynia.pl (wojtek.tensor.gdynia.pl [IPv6:2001:4070:101:2::1]) by mx1.freebsd.org (Postfix) with ESMTP id 6AFD88FC08 for ; Thu, 20 Nov 2008 20:10:17 +0000 (UTC) (envelope-from wojtek@wojtek.tensor.gdynia.pl) Received: from wojtek.tensor.gdynia.pl (localhost [IPv6:::1]) by wojtek.tensor.gdynia.pl (8.14.3/8.14.2) with ESMTP id mAKJpaa7016868 for ; Thu, 20 Nov 2008 20:51:36 +0100 (CET) (envelope-from wojtek@wojtek.tensor.gdynia.pl) Received: from localhost (wojtek@localhost) by wojtek.tensor.gdynia.pl (8.14.3/8.14.2/Submit) with ESMTP id mAKJpKEh016830; Thu, 20 Nov 2008 20:51:36 +0100 (CET) (envelope-from wojtek@wojtek.tensor.gdynia.pl) Date: Thu, 20 Nov 2008 20:51:20 +0100 (CET) From: Wojciech Puchar To: Marcel Grandemange In-Reply-To: <02c801c94b40$4b6a2f10$e23e8d30$@za.net> Message-ID: <20081120204756.O16829@wojtek.tensor.gdynia.pl> References: <02c801c94b40$4b6a2f10$e23e8d30$@za.net> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Cc: questions@freebsd.org Subject: Re: ZFS Recovery Tools X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 20 Nov 2008 20:10:19 -0000 > all the input from various users I assume zfs would be the file system of > choice for such large volumes? > > Are there limitations or downsides using UFS on such a large volume? no, unless you will create it with default options. use -i big-power-of-two simply to have enough inodes for your files, but not 100 times too much. too much inodes=more wasted space AND VERY SLOW FSCK use -b 32768 or 65536 depending of your file's average size. -b 16384 will work too, but again fsck may be long. of course turn on softupdates. UFS performs excellent on large drives/volumes. not in theory but in practice, i use it every place, on volumes up to 3GB NO PROBLEMS. > Also are there any tools for recovery off ZFS volumes? Accidental > delete/format/corruption...? no.