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    SubjectRe: Virtual WORM device
    On Jan 07, 2003  18:41 +0000, John Bradford wrote:
    > > Somebody should then modify `rm` and the kernel unlink
    > > to `mv' files to the dumpster directory on the
    > > file-system, instead of really deleting them.
    >
    > Another possibility would be to create a meta-device that works like a
    > cross between the loopback device, and WORM device, I.E. start at the
    > begining, and allocate sectors sequentially. Whenever a sector would
    > normally be overwritten, a new one is allocated instead. This way,
    > you could always access the filesystem as it was at any mount in time.

    This is commonly called a filesystem snapshot, and you can already do
    it with LVM.

    Cheers, Andreas
    --
    Andreas Dilger
    http://sourceforge.net/projects/ext2resize/
    http://www-mddsp.enel.ucalgary.ca/People/adilger/

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