It's late in the day, but my 2c here is to add that it's not always necessary 
in Windows to use separate drive letters for LUNs - it's possible to 'mount' a 
volume under a directory rather than eating letters.  This would appear to be a 
much more scalable approach - however, the difficulty as we discovered is that 
under some operations (e.g. format/restore the db) drive space is calculated 
based on the letter, even though there is space available in the actual db 
directory - meaning incorrect calculations.

Just a warning - mounting volumes under a single letter and sub directories 
_should_ work fine but doesn't.  I'm not sure about IBM support on that either. 
Lots of drive letters is the only way to go.

> On 12/09/2012 11:30 AM, Prather, Wanda wrote:
> > Hi Steve,
> >
> > DB2 on Windows, like on AIX, does his %full calculations based on
> > the amount of space on the drives where the DB and logs are
> > located, just like it would do the %full calculations based on the
> > amount of space in an AIX filesystem.