Problems with AHA2940UW and external RAID

[Doug Ledford]

> I disabled both Wide and Synchronous negotiation on the RAID drive (ID
> 1) in the Adaptec's BIOS but this was not the solution. The same
> problems occur.
> 
> If I use DOS, I can communicate with the RAID-System, therefore this
> seems to be a real problem of the Linux SCSI-driver and not of the
> RAID drive or the controller. Also, I can use low-level format and
> verify of the Adaptec's BIOS

At this point we are down to only a few possibilities left.  We've 
disabled sync and wide negotiation, so that isn't it, we aren't using 
tagged queueing yet so that isn't it, and the only things that should 
have taken place with that device on the bus are a TEST_UNIT_READY 
command and that's it.  The command it hangs on is the INQUIRY command.  
We're kinda down to only a few things left.  That device simply doesn't 
like some timing issue in the sequencer, it doesn't like our INQUIRY 
command from the mid level SCSI code, or possibly it has something to do 
with the Disconnect priviledge.  The first two are the hardest ones to 
change, so let's try going into the Adaptec SCSI BIOS again and this time 
switch the disconnection enabled to disconnection disabled (or vice-versa 
depending on what it currently is) and see if that makes a difference.

------------------------------------
Doug Ledford <dledford at dialnet.net>
"Opinions expressed are my own, but
 they should be everybody's."
                      Me
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