From: Gabel Martin (Martin.Gabel@ffm3.siemens.de)
Date: Wed Jun 12 2002 - 08:09:04 EDT
Hi folks, has anyone seen this before ...?
One of our customers uses a e4000 with Sol. 2.5.1.
This machne crashed last monday. Network down and no input via serial
console possible. Only a full power off / on would bring the server up. The
POSt seemed to be OK but after the banner the machine hung. No Unix login,
no break signal possible (serial console with PC-style-Keyboard). So we
removed the serial console and did a brute-force 'stop a' with a SUN
keyboard.
Afterwards I plug the console again and enabled full diag level plus diag
switch (at OK prompt level). The console had/has a verry strange behaviour.
When you write a command, it generates tons of incorrect characters and
signs. Nearly every 3rd char I had to correct. (i.e. you type printenv,
screen says: p$intz&v). Finaly I managed to type the correct commands and
reboot: 'ok>boot -sv'
I seemed that a board was damaged and so I called the SUN tech. He replaced
the board, pluged in his Notebook with Hyperterm and ran the diag again: No
problems. Machine booted into single user mode without any problems. BUT,
after he had left, I repluged the serial console again and the whole system
hung after the banne. So the true fraudulent part was the serial console.
Acually we replaced it with another one and everything is fine...
How can a serial console hang a whole server ?!?!?!?!
cu
may
martin.gabel@ffm3.siemens.de
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