In <URL:news:local.netbsd.port-arm32> on Fri 28 May, Richard Earnshaw wrote:
> > 
> > Hmmm. I was told to have "/" , "/usr", "/var" and "/tmp" on different
> > partitions so you could mount the big ones read-only when trying; as far
> > as I know, netbsd boots ok with all mounts read-only exept /tmp and /var; 
> > since they are rel. small (64 + 128 M in my case). Checking them is very
> > fast. So you could think of expirimenting with your dev. code in
> > /var/whatever and syncing before you try to crash it :-) 
> > 
> 
> The really slow discs are on an Acorn SCSI card; performance on that 
> sucks, which is why it takes so long to check them.

With 1.2 it used to be 170 KB/s on my ARM610 and AKA-32.

> 2) I heard about 2 years back that there was some work on making the Acorn
> SCSI card use dma to and from it's buffer memory.  Does anyone know what 
> happened to that work?  If it got completely lost, does anyone have the 
> programming info for those boards?  I might be able to find time to look 
> at improving this driver (I don't have any critical data on those disks at 
> this time, so I can do some testing without fear :-).

I don't think there was ever released a technical manual for this
card, but I do have the data sheet for the Am33C93 SCSI chip somewhere,
and I do have the original manual that accompanied the card.

I also have the original A310 TRM, but I don't think there is anything
in there specifically for this card.

The work that was ongoing was supposed to be done be done by Mark,
but I guess that he has had other priorities.

Kjetil B.
mailto:kjetil@thomassen.priv.no
http://home.eunet.no/~kjetilbt/