Optimizer for SCO Xenix 2.3.3

[Ken McVay]

After enjoying the convenience of Vopt, SD, Compress and similar disk
optimizing systems, I find the lack of same frustrating for my Xenix 
system.  

I understand that there are a few optimizing systems out there, and my
bbs could certainly use one - can anyone suggest one that has a good record
for reliability? I'd like to be able to optimize the entire system on a
daily basis, to improve disk i/o...