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DGS (General)
takahiro.yamamoto - 13:41 Monday 30 September 2019 (10771) Print this report
Weekly maintenance on Sep. 30, 2019
[Oshino, Yamamoto]

= What we did =
  • Stopped an NFS server, k1nfs0, for taking system backup.

  • Re-launched an EPICS gateway, k1epics.

  • Restarted k1ctr0-5 and k1mon0-10 for updating EPICS_CA_ADDR.

  • Requested SAFE state for all VIS guardian nodes and stopped DAC output for Type-C suspensions (with Fujii-kun's help).

  • Restarted the guardian daemon.

  • Stopping an script server, k1script, for taking system backup.

  • Restored snapshot for Type-C suspensions (with Dr. Okutomi's help).

  • Restored IMC lock (with Kokeyama-san's help).


= Problems we found =
  • User-code error was occurred on Type-Bp guardian at moving from ALIGNED state to SAFE state (Ushiba-kun is checking now).

  • Type-A guardian immediately move to SAFE state as reported in klog10767. (Someone should be assigned for this issue.)

  • We found some scripts operated in bad manners. They should be launched by each maintainer and should be managed as a daemon process by using systemd, supervisor, etc.

    • freqmonitor_[XY]PLL.py

    • pcal_[xy]pll.py

    • do_script.sh (maybe beam position monitor related.)



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