Unionfs and nullfs question

[Vulpes Velox]

Just got reading the man for both of those. The thing I am wondering
about is, under what circumstances are they dangerous to use.  Mainly
in unionfs, since I don't think it can be done using nullfs.

Any ways, here is what is happening... I have two drives mounted, and
I want the contents from both to appear in one dir. So I have one
blank dir that those filesystems are union mounted too.


The other thing I was wondering about is this... having a second home
dir and union mounting it to ~ for the purpose of storing over ride
configs for the base rcs.... mainly for making it some what easier for
keeping seperate settings for some programs based on what machine it
is on. Not tried this yet, but been thinking about it.




Any ways, input is welcome :)

I am guessing the answer, given the big warning in the man for both is
that this is going to be a no that both are dangerous to the data and
luck is mainly involved in not having the data screwed over, but just
wanna check :)


Thanks in advance! :)