Re: WD 93c33 trouble - resolved.

[Michael <macallan%netbsd.org@localhost>]

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Hello,

On Feb 18, 2009, at 1:47 PM, jscottkasten%yahoo.com@localhost wrote:

> --- On Wed, 2/18/09, Michael <macallan%netbsd.org@localhost> wrote:
>
> > > I was more thinking about a external ID switch box -
> > like the ones
> > > on the back of drive cases connected upside-down.
> > Creates interesting
> > > combinations.  But Michael explicitely said
> > "Nay".
> >
> > It's jumpered to ID1, ARCS reports it there. If I
> > change it to ID2 and leave it alone ARCS reports it as ID2
> > as does NetBSD. It's some other craziness.
>
> This makes me wonder if it's really some firmware issue in the drive  
> itself.

More weirdness. With the external ZIP actually powered up the NetBSD  
kernel finds it as sd1 without any trouble. If I power up the 2nd  
harddisk we hang again after attaching sd0.
Now ZIPs aren't exactly known for being good SCSI citizens.

Also, apparently my earlier theory about Target Initiated Sync  
Negotiations seems to be right - I found a jumper sitting in a  
'reserved' position, removed it and all of sudden the kernel detects  
both harddisks.
So, for future reference, on IBM DORS-32160 drives the jumper between  
'Unit Attention Disable' and 'Auto Start Delay' which is labeled as  
'Reserved', being the JP8 counted from the right ( don't ask me why  
they did that ) in the datasheet enables Target Initiated Sync  
Negotiation or something else that hopelessly confuses the wd33c93  
driver. No idea why it was set in the first place.
The drive in question is an SGI-badged IBM ( and ironically, the other  
one is a Compaq-badged Seagate )

have fun
Michael

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