moving /usr to another partition

[Don Lewis]

On  5 Jul, Konstantin 'Kosta' Welke wrote:
> Hi!
> 
> Diskspace is running low, so I'd like to move my /usr to another
> disk. I was told that cp -Rv is not a good idea and i should use
> dump instead. The problem is: That disk is big and half-full and
> I don't want to empty it. Is it possible  to let restore work to
> a directory instead of a disk? Im not sure after reading the man
> page, google doesnt know either and I dont want to find out "the
> hard way". So i guessed it couldn't hurt to ask...
> 
> If you have any hints or alternatives, please let me know!

I'm pretty sure that "restore -r" will do the right thing and just
unpack the dump archive into the current working directory.  I'm pretty
sure that I've done this in the past.

I don't understand the warnings in the man page:

     -r      Restore (rebuild a file system).  The target file system should
             be made pristine with newfs(8), mounted and the user cd'd into
             the pristine file system before starting the restoration of the
             initial level 0 backup.
             [snip]
             The -r flag precludes an interac-
             tive file extraction and can be detrimental to one's health if
             not used carefully (not to mention the disk)

Restoring into a directory that already contains stuff is likely to be
harmful to the contents, but I think restoring into an empty directory
should be fine.

Anyone else care to comment?