It seems Christoph Herrmann wrote:

Sounds very cool, but there is no URL :)

> Due to vinum it is no problem to add disks and grow your volumes but up to
> now you couldn't easily make use of that new space for a file system, except
> using sequence of ufsdump/newfs/ufsrestore or something similar.
> Thomas ([EMAIL PROTECTED]) and me ([EMAIL PROTECTED]) have written a growfs(8)
> for FreeBSD. Currently we can only grow unmounted file systems (in a clean
> state) without any active snapshots inside. It is foreseen to enhance growfs to
> grow mounted file systems as well, and handle active snapshots correctly.
> This requires some infrastructure which is then only available in FreeBSD-5,
> whilst the current design runs also happily on FreeBSD-4 and FreeBSD-3
> (tested) and possibly even on FreeBSD-2 (untested).
> To help us gathering the needed data for fixing bugs in growfs we additionally
> wrote ffsinfo(8), a (very) extended version of dumpfs.
> We've sent a couple of snapshots of our code to Kirk McKusick and to Greg
> Lehey. Greg also volunteered :-) for reviewing the code. We also maintain
> some sort of (for some contractual reasons unilaterally) contact with Don
> Coleman who is doing the same thing for BSD/OS.


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