-----Original Message-----
From: Debbie Xu [mailto:DXu@intrinsyc.com]
Sent: Thursday, May 22, 2003 9:21 AM
To: 'Theodore Ts'o'; Debbie Xu
Cc: 'ext3-users@redhat.com'
Subject: RE: How to create EXT3 file system image from directories?Thanks a lot, it works!
Why do I have to use "-o loop" option?Tx,
Debbie-----Original Message-----
From: Theodore Ts'o [mailto:tytso@mit.edu]
Sent: Wednesday, May 21, 2003 7:55 PM
To: Debbie Xu
Cc: 'ext3-users@redhat.com'
Subject: Re: How to create EXT3 file system image from directories?On Wed, May 21, 2003 at 02:57:00PM -0700, Debbie Xu wrote:
> Hi there,
>
> Is there a utility to create an EXT3 file system image from directories?
> Just like the mkfs.jffs2 which creates a JFFS2 file system image from
> directories?
>
> The "mke2fs -j" only creates the bare bone file system, what I want is to
> build an image with pre-built content.The easist thing to do is to create a filesystem on a file using
mke2fs, and then mount the filesystem using the loopback device:dd if=/dev/zero of=foo.img bs=1k count=16384
mke2fs -f foo.img
mount -o loop foo.img /mnt
cp -r /source /mnt
umount /mnt- Ted
Because foo.img is a file not a block device.
Loop
back device provide a block device for that file.
Chris
