another SMstore file throttle issue

[Rick Stading]

news-makers,
   I've been affected by whatever issue causes my server (inn2.3.1 on solaris8 
w/tradspool) to throttle due to 'A news (NNTP) error occured: no space left on 
device writing SMstore file'.  (there's plenty of disk space available)
   
   I've seen mutiple postings concerning this in the archive, but I haven't seen 
anyone post the solution.  Whats the best way for me to deal with this issue?
   Thanks,
   Rick Stading