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Entry  Thu Feb 23 15:48:43 2017, johannes, Update, Computers, c1psl un-bootable scope_PDA520_ITM_aligned_ETM_misaligned.pngscope_PDA520_ITM_slightly_misaligned.pngpmc_trans_last10days.png
    Reply  Thu Feb 23 18:52:53 2017, rana, Update, Computers, c1psl un-bootable 
       Reply  Thu Feb 23 19:44:48 2017, johannes, Update, Computers, c1psl un-bootable slow_startup_logs.tar.gz
          Reply  Fri Feb 24 20:38:01 2017, johannes, Update, Computers, c1psl boot-stall culprit identified 
          Reply  Tue Feb 28 01:28:52 2017, johannes, Update, Computers, c1psl un-bootable 
             Reply  Wed Mar 8 18:18:51 2017, johannes, Update, Computer Scripts / Programs, loss script 
                Reply  Thu Mar 9 22:28:11 2017, johannes, Update, Computer Scripts / Programs, loss script 
                   Reply  Fri Mar 10 11:37:25 2017, gautam, Update, Computer Scripts / Programs, loss script 
                      Reply  Fri Mar 10 19:48:56 2017, johannes, Update, Computer Scripts / Programs, loss script 
                         Reply  Sat Mar 11 20:11:58 2017, johannes, Update, Computer Scripts / Programs, loss script 
Message ID: 12851     Entry time: Thu Feb 23 19:44:48 2017     In reply to: 12850     Reply to this: 12852   12854
Author: johannes 
Type: Update 
Category: Computers 
Subject: c1psl un-bootable 

Yes, that was one of the things that I wanted to look into. One thing Gautam and I did that I didn't mention was to reconnect the SRM satellite box and move the optic around a bit, which didn't change anything. Once the c1psl problem is fixed we'll resume with that.

Quote:

The fringes seen on the oscope are mostly likely due to the interference from multiple light beams. If there are laser beams hitting mirrors which are moving, the resultant interference signal could be modulated at several Hertz, if, for example, one of the mirrors had its local damping disabled.

 

Speaking of which:

Using one of the grey RJ45 to D-Sub cables with an RS232 to USB adapter I was able to capture the startup log of c1psl (using the usb camera windows laptop). I also logged the startup of the "healthy" c1aux, both are attached. c1psl stalls at a point were c1aux starts testing for present vme modules and doesn't continue, however is not strictly hung up, as it still registers to the logger when external login attempts via telnet occur. The telnet client simply reports that the "shell is locked" and exits. It is possible that one of the daughter cards causes this. This seems to happen after iocInit is called by the startup script at /cvs/cds/caltech/target/c1psl/startup.cmd, as it never gets to the next item "coreRelease()". Gautam and I were trying to find out what happends inside iocInit, but it's not clear to us at this point from where it is even called. iocInit.c and compiled binaries exist in several places on the shared drive. However, all belong to R3.14.x epics releases, while the logfile states that the R3.12.2 epics core is used when iocInit is called.

Next we'll interrupt the autoboot procedure and try to work with the machine directly.

Attachment 1: slow_startup_logs.tar.gz  3 kB
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