Adaptec 1542A tuning of 386/ix 2.2 kernel

[Larry Snyder]

I recently upgraded from 386/ix 2.02 to 2.2 and am wondering
what I can do to get the best throughput out of my 1542/SCSI
drive/tape system..

The documentation mentions tuning space.c, but in /usr/include/sys/aha1540.h
are some parameters like:

#define AHA_BUSON       5
#define AHA_BUSOFF      9
#define AHA_DMASPEED    1       
#define AHA_NUM_MBOX    8    
#define AHA_RES_MBOX    2  

the only thing that I have changed is the AHA_DMASPEED from the default
of 5 MB (0) to 6.7 (1) - and was wondering if I should try changing some
of these other values and jumpering on the controller...


-- 
 Larry Snyder, Northern Star Communications, Notre Dame, IN 
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