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SubjectUnion fs

>
> >
> > "union fs"??? What's a union fs?
> > One that costs too much and stops working at the drop of a hat, perhaps?
> >
> A union file system can be mounted over another read 0only file system.
> The files underneath show through until you modify one, at which time
> the midifyed file is written to the union fs. This allows you to, for
> instance, compile a kernel on a mounted cdrom drive, where the object
> files would be written onto the union fs over layed on it.

Ah-----This is how clearcase works (it's the source control utility we use
at work on a Sun).


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