|
HP OpenVMS Systemsask the wizard |
|
The Question is: I will be performing VMS upgrades to V6.2 on about 25 systems located at one of our remote sites. I need to be able to log all of the upgrade. Set Host/log won't be sufficient because several reboots occurr during the upgrade. What I need to be able to do is connect the console port of the upgrade system to a serial port of a near by system. I will not have access to PCM, so it is not a solution, although I know that with this software and the right terminal server, I would be home free. I have been working with a MicroVAX 3100-80 and 3100-90 trying to use the 3100-80 TTA2 port as the console for the 3100-90 system. However this causes the system to halt every time I do anything that touches the TTA2 port on the 3100-80, such as $SHOW TERM TTA2: or $SHOW DEVICE TTA2: or $SET HOST/DTE TTA2: What is the technique for implementing this configuration without crashing the system? The Answer is : It would appear you have the speed set incorrectly on the console serial port, and this is effectively a serial line framing error, which itself is effectively a BREAK signal, which effectively halts the system. This assumes that the activities that halt the system involve anything that might cause input (and specifically framing errors) to be received on the console serial line. One available approach to achieving the logging is via SET HOST/LOG/DTE via a modem on the console serial line. Beware that leaving this modem connected can potentially open a security hole, as access to the system console should be controlled. A directly-connected serial line is also possible, either via another host port or via a DECserver. (Some form of electrical isolation -- such as a fiber-optic coupler -- is generally prefered when connecting directly to the serial line.)
|