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Entry  Wed Jan 25 14:30:20 2017, gautam, Update, CDS, slow machine bootfest 
    Reply  Fri Jan 27 17:07:52 2017, Lydia, Update, CDS, slow machine bootfest 
       Reply  Mon Feb 6 15:18:08 2017, gautam, Update, CDS, slow machine bootfest 
          Reply  Thu May 25 12:22:59 2017, gautam, Update, CDS, slow machine bootfest 
             Reply  Thu Jun 1 15:37:01 2017, gautam, Update, CDS, slow machine bootfest 
                Reply  Mon Jun 12 10:34:10 2017, gautam, Update, CDS, slow machine bootfest 
                   Reply  Fri Jun 16 13:53:11 2017, gautam, Update, CDS, slow machine bootfest 
                      Reply  Wed Jul 5 16:09:34 2017, gautam, Update, CDS, slow machine bootfest 
                         Reply  Wed Aug 30 10:54:26 2017, gautam, Update, CDS, slow machine bootfest 
                            Reply  Tue Sep 5 23:02:37 2017, gautam, Update, CDS, slow machine bootfest 
                               Reply  Tue Oct 3 19:39:10 2017, gautam, Update, CDS, slow machine bootfest 
                                  Reply  Thu Oct 5 11:46:15 2017, gautam, Update, CDS, slow machine bootfest 
                                     Reply  Thu Oct 12 14:42:45 2017, gautam, Update, CDS, slow machine bootfest 
                                        Reply  Mon Oct 30 11:15:02 2017, gautam, Update, CDS, slow machine bootfest + vacuum snafu 
                                           Reply  Mon Nov 6 11:15:43 2017, gautam, Update, CDS, slow machine bootfest + IFO re-alignment 
                                              Reply  Tue Jan 9 11:52:29 2018, gautam, Update, CDS, slow machine bootfest 
                                                 Reply  Wed Jan 10 12:24:52 2018, gautam, Update, CDS, slow machine bootfest 
                                                    Reply  Fri Jan 19 11:13:21 2018, gautam, Update, CDS, slow machine bootfest 
                                                       Reply  Wed Apr 4 16:23:39 2018, gautam, Update, CDS, slow machine bootfest 
                                                          Reply  Wed Apr 18 10:44:45 2018, gautam, Update, CDS, slow machine bootfest MCautolocker_MEDM_revamp.png
                                                             Reply  Thu May 3 12:19:13 2018, gautam, Update, CDS, slow machine bootfest 
                                                                Reply  Thu Jun 7 12:20:53 2018, gautam, Update, CDS, slow machine bootfest ITMX_stuck.png
          Reply  Tue Oct 24 16:43:11 2017, Steve, Update, CDS, slow machine bootfest 
Message ID: 13408     Entry time: Mon Oct 30 11:15:02 2017     In reply to: 13379     Reply to this: 13410
Author: gautam 
Type: Update 
Category: CDS 
Subject: slow machine bootfest + vacuum snafu 

Eurocrate key turning reboots today morning for c1psl and c1aux.c1auxex and c1auxey are also down but I didn't bother keying them for now. PSL FSS slow loop is now active again (its inactivity was what prompted me to check status of the slow machines).

Note that the EPCIS channels for PSL shutter are hosted on c1aux.But looks like the slow machine became unresponsive at some point during the weekend, so plotting the trend data for the PSL shutter channel would have you believe that the PSL shutter was open all the time. But the MC_REFL DC channel tells a different story - it suggests that the PSL shutter was closed at ~4AM on Sunday, presumably by the vacuum interlock system. I wonder:

  1. How does the vacuum interlock close the PSL shutter? Is there a non-EPICS channel path? Because if the slow machine happens to be unresponsive when the interlock wants to close the PSL shutter via EPICS commands, it will be unable to. The fact that the PSL shutter did close suggests that there is indeed another path.
  2. We should add some feature to the vacuum interlock (if it doesn't already exist) such that the PSL shutter isn't accidentally re-opened until any vacuum related issues are resolved. Steve was immediately able to identify that the problem was vacuum related, but I think I would have just re-opened the PSL shutter thinking that the issue was slow computer related.
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