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Old 01-16-2008, 01:52 PM
Rich Teer
 
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Default Re: Internal disk address in Ultra 2

On Fri, 9 Jul 2004, Dave Uhring wrote:

> On Fri, 09 Jul 2004 23:45:20 +0000, Patrick L. Nolan wrote:
>
> > The second internal disk bay in my Ultra 2 has been empty for
> > 5 years. I finally got a 36 GB SCA disk to fill it. I set
> > the jumper for SCSI target 4, which was not used by any other
> > device. When the machine booted, the new disk was seen at
> > address 5! What's going on?

>
> 1+4=5
>
> The backplane sets the target address to 1.


Just to amplify that a bit: internal disks in Ultra 2s (and
many other Sun machines for that matter) should not have any
of the device ID jumpers set, because the backplane determines
the target ID.

--
Rich Teer, SCNA, SCSA

President,
Rite Online Inc.

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