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Re: WD 93c33 trouble - resolved.



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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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