Changing Mosaic data acquisition machines

Updated on June 4, 2021, 9:33 am

Switching which computer acts as Mosaic data acquisition machine is fairly easy and fairly quick (15 min), if you know how to do it. Here is a detailed, straightforward example of how to do it. For this example, we show the move from ctioa0 to ctioa1.

HARDWARE:

1. move serial connection from ctioa0 to ctioa1

2. change nexus connections from ctioa0 to ctioa1 (4 cables "rj-11"), installing them in the same order.

  • This assumes that ctioa1 has an Alta board. If it has a Parsytec board, one must replace it with an Alta board to allow Mosaic to function.

 

SOFTWARE:

  1. on ctioa0: kill msmid
    1. su (log in as root)
    2. ps aux | egrep msmid
    3. kill -9 XXXX (XXXX = process id of mscmid)
  2. on ctioa1: start msmid
    1. su (log in as root)
    2. cd /home/logs
    3. rm mseCommPortIsInUse!
    4.  /usr/local/bin/start-msmid
  3. check that the new machine is registered
    1. rsh ctio4m -l mosaic
    2. pvm
    3. > conf (outputs list of registered machines)
    4. IF ctioa1 is not there...
    5. add ctioa1
  4. log out & log in as mosaic

IF ctioa1 has been running normal arcon, you also need to run SetFiles to finish the setup, setting "Software version" to /m2xp/arcon.

 

Last updated: December 27, 1999

 

Please send comments to:
Chris Smith (csmithATnoao.edu)
Marco Bonati (mbonatiATnoao.edu)