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    SubjectRe: Union file system

    On Thu, 28 Nov 1996, Andi Gutmans wrote:

    > On Thu, 28 Nov 1996, Matthias Urlichs wrote:
    > > A loopback mount is far easier than a union file system, and a big
    > > necessity if you need to set up multiple chrooted environments.
    > >
    > > And don't tell me to use a NFS back-mount. NFS is not a solution, NFS is a
    > > problem in and of itself. (Did anybody check the speed of nfs vs smbfs?)
    >
    > Hey,
    >
    > I don't really understand why loopback mounts don't exist in Linux then.
    > It really doesn't sound too hard to implement for someone who knows the fs
    > code of Linux fairly well.
    > Any volunteers? Loopback filesystems are great.......
    > Andi
    >
    Well some kind of loopback mount exists AND is in the 2.*.* kernels ;)
    You'll just need mount-2.5k (or mount-2.5p as
    linux-2.1.13/Documentation/Changes tells you;)
    then just use mount like:
    mount /tmp/fdimage /mnt -o loop=/dev/loop0,blocksize=1024
    (shortened example from man page)
    if you don't have the /dev entry then you might want to do this:
    mknod /dev/loop0 b 7 0

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