SUMMARY: Loss of console causing crashes:

From: Jeff Zabek (
Date: Tue Jun 06 2000 - 20:38:59 CDT

Hi managers,

Thanks to all the people who helped:

Jonathan Jackson <>, "Eric S. Bryant"
<>, Len Rose <>, Changa Anderson
<>, "Celeste Stokely" <>,
Bill Hathaway <>, Mike van der Velden
<>, Carlo Musante <>, Clinton
Nichols <>, Dan Sweet
<>, "Donelle, Charles"
<>, Vince Hoang <>, Adrian
Saidac <>, Artur Shnayder
<>, Geoffrey Press <>,
"Wilkinson, Daniel" <>, John Malick
<>, Sanjeev Gooneratne <>, and Stefan
Voss <>.

The general response suggested one or more of these solutions: turn
the key on the system to the "secure" mode, which makes the system
ignore breaks; buy a terminal or terminal server (NT sucks); use "kbd
-a disable" to disable break signals at the OS level; use "kbd -a
alternate" to make the break sequence be ~^b instead of the standard

The original problem:

I am having a problem with servers crashing due to loss of the
console. Here's the scenario:

Server is an E4500. Console is a Windows NT PC which I can connect to
via pcAnywhere, with a serial cable and null modem adapter connected
from COM1 of the PC to serial port A on the E4500. I use terminal
emulation software (Hyperterminal or CRT) to connect to the COM port
on the Windows box and this accesses the console port of the E4500 so
I can work directly from it. Problem is that if the NT box crashes or
if the cable somehow gets yanked from it, the E4500 crashes. I have
experienced problems before which were similar to this, where the Sun
box would jump to the boot PROM, but nothing quite like this.

Jeff Zabek, Solaris Systems Administrator, Hosted Services
WebEx -- -- Email
100 Rose Orchard Way, San Jose, California  95134
Phone (408) 435-5723; Fax (408) 435-7227; Cell (408) 420-6334

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