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Entry  Wed Sep 29 17:10:09 2021, Anchal, Summary, CDS, c1teststand problems summary c1teststand_issues_summary.pdf
    Reply  Thu Sep 30 14:09:37 2021, Anchal, Summary, CDS, New way to ssh into c1teststand 
    Reply  Mon Oct 4 11:05:44 2021, Anchal, Summary, CDS, c1teststand problems summary 
       Reply  Mon Oct 4 18:00:16 2021, Koji, Summary, CDS, c1teststand problems summary 
          Reply  Tue Oct 5 17:58:52 2021, Anchal, Summary, CDS, c1teststand problems summary 
       Reply  Tue Oct 5 18:00:53 2021, Anchal, Summary, CDS, c1teststand time synchronization working now 
          Reply  Mon Oct 11 17:31:25 2021, Anchal, Summary, CDS, Fixed mounting of mx devices in fb. daqd_dc is running now. 
             Reply  Mon Oct 11 18:29:35 2021, Anchal, Summary, CDS, Moving forward? 
                Reply  Tue Oct 12 17:20:12 2021, Anchal, Summary, CDS, Connected c1sus2 to martian network 
                   Reply  Tue Oct 12 23:42:56 2021, Koji, Summary, CDS, Connected c1sus2 to martian network 
                      Reply  Wed Oct 13 11:25:14 2021, Anchal, Summary, CDS, Ran c1sus2 models in martian CDS. All good! CDS_screens_running.png
                         Reply  Tue Oct 19 18:20:33 2021, Ian MacMillan, Summary, CDS, c1sus2 DAC to ADC test data3_Plots.pdfdata2_Plots.pdf
                            Reply  Tue Oct 19 23:43:09 2021, Koji, Summary, CDS, c1sus2 DAC to ADC test P_20211019_224433.jpgP_20211019_224122.jpgP_20211019_224400.jpgP_20211019_224411.jpg
                               Reply  Wed Oct 20 11:48:27 2021, Anchal, Summary, CDS, Power supple configured correctly. 
                               Reply  Tue Oct 26 18:24:00 2021, Ian MacMillan, Summary, CDS, c1sus2 DAC to ADC test data2_Plots.pdfdata3_Plots.pdf
             Reply  Tue Oct 12 17:10:56 2021, Anchal, Summary, CDS, Some more information 
Message ID: 16392     Entry time: Mon Oct 11 18:29:35 2021     In reply to: 16391     Reply to this: 16396
Author: Anchal 
Type: Summary 
Category: CDS 
Subject: Moving forward? 

The teststand has some non-trivial issue with Myrinet card (either software or hardware) which even teh experts are saying they don't remember how to fix it. CDS with mx was iin use more than a decade ago, so it is hard to find support for issues with it now and will be the same in future. We need to wrap up this test procedure one way or another now, so I have following two options moving forward:


Direct integration with main CDS and testing

  • We can just connect the c1sus2 and c1bhd FE computers to martian network directly.
  • We'll have to connect c1sus2 and c1bhd to the optical fiber subnetwork as well.
  • On booting, they would get booted through the exisitng fb1 boot server which seems to work fine for the other 5 FE machines.
  • We can update teh DHCP in chiara and reload it so that we can ssh into these FEs with host names.
  • Hopefully, presence of these computers won't tank the existing CDS even if they  themselves have any issues, as they have no shared memory with other models.
  • If this works, we can do the loop back testing of I/O chassis using the main DAQ network and move on with our upgrade.
  • If this does not work and causes any harm to exisitng CDS network, we can disconnect these computers and go back to existing CDS. Recently, our confidence on rebooting the CDS has increased with the robust performance as some legacy issues were fixed.
  • We'll however, continue to use a CDS which is no more supported by the current LIGO CDS group.

Testing CDS upgrade on teststand

  • From what I could gather, most of the hardware in I/O chassis that I could find, is still used in CDS of LLO and LHO, with their recent tests and documents using the same cards and PCBs.
  • There might be some difference in the DAQ network setup that I need to confirm.
  • I've summarised the current c1teststand hardware on this wiki page.
  • If the latest CDS is backwards compatible with our hardware, we can test the new CDS in teh c1teststand setup without disrupting our main CDS. We'll have ample help and support for this upgrade from the current LIGO CDS group.
  • We can do the loop back testing of the I/O chassis as well.
  • If the upgrade is succesfull in the teststand without many hardware changes, we can upgrade the main CDS of 40m as well, as it has the same hardware as our teststand.
  • Biggest plus point would be that out CDS will be up-to-date and we will be able to take help from CDS group if any trouble occurs.

So these are the two options we have. We should discuss which one to take in the mattermost chat or in upcoming meeting.

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