Why can't I create a database in a 107GB dbspace I created for my instance?
How did you create the dbspace ? I'm a bit astonished that you showed up a directory listing instead of the output from onstat -d - just creating a file does not do the job.
Run onstat -d and see if there is a dbspace called "datadbs". If not, cd to the directory where the dbspace should reside, create a suitable file (i. e. echo gaga &gt;datadbs content does NOT matter) and create the dbspace using "onspaces". This should look similar to

onspaces -c -d datadbs -p c:\dbspaces\datadbs -o 0 -s 128000000


For more options enter onspaces -?

Hope this will help