Is there any boot parameter or so to make it work in "ultra" mode ?
I think what you want is in this clip from
/usr/src/linux/drivers/scsi/aic7xxx.c:
* A Boot time option was also added for not resetting the scsi bus.
*
* Form: aic7xxx=extended
* aic7xxx=no_reset
* aic7xxx=ultra
* aic7xxx=irq_trigger:[0,1] # 0 edge, 1 level
* aic7xxx=verbose
*
So you might try aic7xxx=ultra or aic7xxx=ultra,verbose.
I have no idea if this works or will even do anything; I just remember
running across this when trying to debug a tape drive problem.
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