I have a IIvx that i use 1.2 generic (ncrscsi) #0 on for awhile.
the next kernel i found that worked on my IIvx was genericsbc#26. now, i
currently am using generic (ncrscsi) #47 with no problems. the sbc #47 did
not boot on my machines and made it hang at the options= line. i remembr
niether sbc nor scsi #44 would boot on my IIvx, so something must have
changed since then that made it work. i also used the new booter.
so, unless your drives *need* sbc, try ncrscsi#47, cause it works like a
charm on my IIvx. uptime is 19 days now.
good luck,
  - a

On Thu, 4 Dec 1997, Josh Hope wrote:

> So this is just another case of Apple not giving us enough information on
> these SCSI drivers?
> 
> Maybe we could look back at the changes done between SBC 26 and SBC 27
> that lasted in the SBC series up until the current SBC? Maybe we could
> trace the problem or something?
> 
> It just seems like a run away problem. I mean, we're up to the 50's in
> kernel numbers, aren't we? :)
> 
> I'd really like to use a newer kernel, with some bug fixes (i.e. the one
> that prevents that nasty freezing bug I experienced earlier)...and it'd be
> nicer to be able to upgrade to a more recent snapshot, but the last time I
> did that, my kernel was way too out of sync with the binaries and it
> caused numerous problems...
> 
> Well, thanks to everyone...
> 
> On Thu, 4 Dec 1997, Michael R Zucca wrote:
> 
> > > I have the same problem on my LCII with a quantum drive.  The only kernel
> > > I have had success with is SBC #15.  The later SBC kernels freeze up at
> > > the same place "sbc0 at obio0: options=1<PDMA>" except for #26 with
> > > freezes at a different line.  I forget where it freezes, I haven't tried
> > > booting it in a while.
> > 
> > Same problem on my IIvx. In case folks havn't noticed there's a trend here.
> > 
> > The LCII/IIvx/Performa 600 use the V8/VASP chips as their main clock/control
> > chip and I would imagine that they also use the same variant of the SCSI
> > controller. (The VASP is almost a direct derivative of the V8 gate array
> > for those not up on their Apple Technotes)
> > 
> > There is apparently something we don't understand about the V8/VASP chips
> > that is casuing SCSI problems. The SBC problem is one, the kernel size SCSI
> > bug with NCRSCSI kernels is likely another (though, that is likely related
> > to a memory mapping problem as well).
> > 
> > Right now we seem to be making the assumption that the LC/IIvx machines
> > function nearly identically to the IIsi/IIci which use the RBV chip as
> > their main clock/controller. Trouble is, while all the chips are pretty
> > much the same, there is some tiny obnoxious difference that crops up
> > that we don't quite handle.
> > 
> > Sure wish we knew what that was :-)
> > 
> > 
> 
> Josh Hope                                          root@unixgeek.ml.org
> UNIX System Administrator                        http://unixgeek.ml.org
> -----------------------------------------------------------------------
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>