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Message-ID: <cce9e37e041218115321c300b9@mail.gmail.com>
Date: Sat, 18 Dec 2004 19:53:25 +0000
From: Phil Lougher <phil.lougher@gmail.com>
Reply-To: Phil Lougher <phil.lougher@gmail.com>
To: "Theodore Ts'o" <tytso@mit.edu>,
       "Bhattiprolu, Ravikumar (Ravikumar)" <ravikb@agere.com>,
       linux-kernel@vger.kernel.org
Subject: Re: Magic Number for New File system
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On Fri, 17 Dec 2004 21:39:29 -0500, Theodore Ts'o <tytso@mit.edu> wrote:
> There's no standard place to put a magic number, let alone a standard
> way to generate a magic number.... 
> 
> The blkid library, contained in the e2fsprogs distribution, contains a
> list of magic number and their locations used by various different
> filesystems, if you'd like to take a look at that for some more
> information.

The disktype program (http://disktype.sourceforge.net)  can be used to
decode the content type of a disk/filesystem image.  It recognises a
large amount of filesystems and partition types etc.  From a quick
glance, the documentation describes the concepts behind magic numbers
and superblock formats, and gives an overview of the filesystem
formats recognised.  If you're new to this, this is probably a
reasonable place to start.

Phillip