Re: Union file system

Steven N. Hirsch (shirsch@ibm.net)
Wed, 27 Nov 1996 17:55:27 -0500

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Mikko J Rauhala wrote:
>
> On Wed, 27 Nov 1996, D. Chiodo wrote:
>
> > Symlinks? Mount all the cd, network, disk, etc, then make symlinks from
> > whereyou want you everything to appear to wherever the appropriate files
> > are...
>
> Won't cut it. We're talking about a system that would allow you to eg.
> mount a CD-ROM drive and then mount another filesystem "over" that, so
> that if you write to the file system, the CD-ROM files are hidden behind
> the new files on the writable media. Would be rather handy in some cases...
>

For any interested folks, there is a comprehensive discussion of Union
file systems in the book "Unix Internals" by Uresh Vahalia
(Prentice-Hall, 1996. ISBN 0-13-101908-2). This book is well worth
owning as a reference for some of the deeper technical topics that pop
up on the kernel mailing list :-)).

Steve

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