Thank you - was [Re: Permission issue]

[Richard Owlett <rowlett@cloud85.net>]

Richard Owlett wrote:
> My dual boots Squeeze and Wheezy.
> I've created a partition whose function in life is to be
> essentially a scratch pad for all groups/users of both.
> How do I force all files to be written to that partition to be
> readable AND writable to everybody?

Thank you Siard and David.I think I now know what is happening 
and why.