> 
> However, the 'asc' driver as it currently stands has several serious
> drawbacks or potential drawbacks, at least including the following:
> 
> >        (1) potential instability (due to lack of use/testing) with
> >            the MI SCSI code.
> >
> >        (3) inadequate (or so it would seem, looking
> >            at what the sparc/alpha driver provides) DMA setup
> >            capabilities.
> 
> All fair comments.
> 
> The Pica port seems to address (1) -- quite thoroughly, if the OpenBSD
> ARC port still uses an asc-derived driver.
> 
It does. The queuing functionality of requests could be better though...
It works with MI SCSI code and it works good. I don't have any problems
with it. And i have run discs, tapes, cdroms jaz and zip drives with no
problems.

Then one can always argue about design issues...