A SUN Ultra 1, and it is now dead.
But in its death throes (in between startup and forced shutdown) , it
repeatedly produced the following message :

ADABAD trap cpu MMU data miss

If anyone has any idea as to what the message relates to (ie something
that may be easily replaceable to restore the SUN so a full backup copy
can be made of the disk) , further info would be much appreciated.


Thanks in advance etc

sun guy wrote:
> A SUN Ultra 1, and it is now dead.
> But in its death throes (in between startup and forced shutdown) , it
> repeatedly produced the following message :
>
> ADABAD trap cpu MMU data miss
>
> If anyone has any idea as to what the message relates to (ie something
> that may be easily replaceable to restore the SUN so a full backup copy
> can be made of the disk) , further info would be much appreciated.
>
>
> Thanks in advance etc
>
>
Hi,

possible reasons for this error message :

- faulty cpu module / motherboard
- bad dimm module
- bad scsi disk / controller

You can proactive do the following:

- reseat all memory modules
- reseat int. SCSI Disks

If the problem persists, an extended POST can help.

Connect a terminal (vt 100 / hyperterm etc) to the serial port ( port a)
of the U1.

Disconnect keyboard from the system and power on the U1.

You should see the post output on the terminal.
Check POST output for errors.


HTH

Thomas