From mboxrd@z Thu Jan 1 00:00:00 1970 From: Theodore Tso Subject: Re: Upgrading datastructures between different filesystem versions Date: Wed, 26 Sep 2007 20:53:33 -0400 Message-ID: <20070927005333.GB18346@thunk.org> References: <7e77a4050709250827p26683c6bqc65832783ba1c365@mail.gmail.com> <46F9F0EB.6020404@gmail.com> <20070926161756.GU32520@schatzie.adilger.int> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Jim Cromie , kernel learner , linux-fsdevel@vger.kernel.org, kernelnewbies@nl.linux.org To: Sachin Gaikwad Return-path: Received: from thunk.org ([69.25.196.29]:60292 "EHLO thunker.thunk.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751702AbXI0Axi (ORCPT ); Wed, 26 Sep 2007 20:53:38 -0400 Content-Disposition: inline In-Reply-To: Sender: linux-fsdevel-owner@vger.kernel.org List-Id: linux-fsdevel.vger.kernel.org On Wed, Sep 26, 2007 at 06:29:19PM -0500, Sachin Gaikwad wrote: > Is it not the case that VFS takes care of all filesystems available ? > VFS will see if a particular file belongs to ext3 or ext4 and call > that FS's drivers to access information ?? No, it doesn't quite work that way. You have to mount a particular partition using a specific filesystem (i.e., ntfs, vfat, ext2, ext3, ext4, etc.). A partition formatted using ext2 can be mounted using the ext2, ext3, or ext4 filesystem driver. You can explicitly specify what filesystem should be used to mount a particuar partition using the -t option to the mount program, or by specifying a particular filesystem type in the /etc/fstab file. - Ted