On Tue, Sep 23, 2003 at 12:51:52AM +0000, Charles M. Hannum wrote:
> 
> > I added this to my tree (with my atabus changes), just after the return from
> > __wdcprobe() (in the current tree, this would be in wdcattach()),
> > which helps a lot. As with atabus kernel thread we do this in parallel for
> > all busses, we're down to 3s to detect the ghosts, independant from the
> > number of busses.
> 
> But you can't do that.  You're assuming DRDY will be asserted within
> 3s of BSY being deasserted, but that is NOT what the spec says.

I didn't see any timings specified in the specs, maybe I missed something.
3s is what we do already, for ATA disks the IDENTIFY timeout is 3s (see
ata.c:ata_get_params()), and we try it after a reset in wdcattach()

--
Manuel Bouyer, LIP6, Universite Paris VI.           Manuel.Bouyer@lip6.fr
     NetBSD: 24 ans d'experience feront toujours la difference
--