dtc- removal

[Brett Penza]

We have just removed the last two DTC MUX boxes from our HP9000. We used these to run printers/ dumb terminals for many years, but now everything is networked with ethernet.
The question is. What, if anything, do I have to do on the HP9000, now that the hardware has been removed ? Do I have to disable or remove software on the HP9000 ? Will there be performance issues if I don't ..
Thanks.

[Chris Wilshaw · Accepted solution]

The only impact I can think of is the potential of OCD daemons to go rogue with no proper devices to communicate with, but even this is highly unlikely.

The default config files are in /etc/ddfa. You should rename the file dp in this directory (if it still exists), then kill off any ocd daemon processes on the system.

Any DTC related device files can either be removed (the dp file will tell you where they are located), or they can be left in place as they should be removed at the next reboot of your system anyway.

I'm guessing that you have some DTC manager software installed

eg:

J2496B A143J000 DTC 16RX Manager

If so, you could remove this using swremove, although it doesn't take up any resources (other than a small amount of disk space).

[Tim Sanko]

If you have removed the harware from the CPU then it becomes quite simple.

Remove the path with rmsf /X/X/X to remove mux and ttys.

Tim Sanko

[Tim Sanko]

There should be no significant impact to performance once the ttys are removed from inittab.

Sorry, the correct command is:
rmsf -H x/x/x

To remove the hardware and drivers from the kernel it is a more difficult scenario,

If you edit and remove these from the ioconfig then you would have drivers that are loaded, but no relevant hardware configured.


Tim






Tim