Examples of Problems found during Tracker Shifts and their solutions

Ex.1 JINF T1 (one crate) giving problems

  • Description: Data Prime says T1 is probably causing problems and suggests excluding it from DAQ. After doing Data Prime says there are fewer errors than before, therefore there was a problem with T1. The exclusion of T1 can be seen using AMI from Event size single, where the T1 curve was at 0 bytes.
  • Solution: After discussing the alternative solutions with Lead a priority procedure is set:
    1. Reload software of JINF T1
    2. Restart T1
    3. Change to back-up DAQ: B
  • After reloading the software of T1 the problem disappeared, therefore it was not necessary to try the other alternatives.

Ex.2 TRD16 on Crate 4 having problems

  • Description: Kounine approached Tracker to tell that TRD 16 on Crate 4 was having problems. How to verify this? Check last 1-min files using tkonline last_one_minute.root. There from "Data Menu" select Ladder and from Hwld select Crate 4, TRD 16. Compare Amplitude (ADC) with neighbouring TRDs. A clear difference in the distributions is seen and also fewer entries, therefore the problem is confirmed.
  • Solution: Since it is just one TRD, it is not urgent to solve the problem, therefore wait for Andreas or other expert (Philipp, Paolo) for debugging before suggesting rebooting the TRD. In the end the problem was solved by restarting the board.

Ex.3 TDR reboot

  • Description:

154:01:33 DAQ is stopped; JINJ and TDRs are rebooted:

    • 0030/189 20110603 01:34:27 0523 RP W NA=080=JINJ-0 DT=06 DC=0 ............Flash Load
    • 0030/191 20110603 01:36:31 0526 RP W NA=136=TDR-1-02-A DT=00 DC=0 ........Boot
    • 0030/191 20110603 01:37:16 0529 RP W NA=13F=TDR-1-06-B DT=00 DC=0 ........Boot
    • 0030/192 20110603 01:37:31 052A RP W NA=140=TDR-1-07-A DT=00 DC=0 ........Boot
    • 0030/192 20110603 01:37:50 052B RP W NA=146=TDR-1-10-A DT=00 DC=0 ........Boot
    • 0030/192 20110603 01:38:15 052C RP W NA=15A=TDR-2-08-A DT=00 DC=0 ........Boot
    • 0030/193 20110603 01:38:28 052D RP W NA=168=TDR-3-03-A DT=00 DC=0 ........Boot
    • 0030/193 20110603 01:38:45 052E RP W NA=181=TDR-4-03-B DT=00 DC=0 ........Boot
    • 0030/193 20110603 01:38:59 052F RP W NA=198=TDR-5-03-A DT=00 DC=0 ........Boot
    • 0030/193 20110603 01:39:12 0530 RP W NA=1AD=TDR-6-01-B DT=00 DC=0 ........Boot
    • 0030/194 20110603 01:39:22 0531 RP W NA=1AE=TDR-6-02-A DT=00 DC=0 ........Boot
    • 0030/194 20110603 01:39:33 0532 RP W NA=1B4=TDR-6-05-A DT=00 DC=0 ........Boot
    • 0030/194 20110603 01:39:48 0533 RP W NA=1C1=TDR-6-11-B DT=00 DC=0 ........Boot
    • 0030/194 20110603 01:39:58 0534 RP W NA=1C2=TDR-7-00-A DT=00 DC=0 ........Boot
    • 0030/194 20110603 01:40:08 0535 RP W NA=1C3=TDR-7-00-B DT=00 DC=0 ........Boot
    • 0030/195 20110603 01:40:20 0536 RP W NA=1C8=TDR-7-03-A DT=00 DC=0 ........Boot

Ex.4 TDR reboot

  • Description: DSP Program Selftest executed. TDR-4-00-A and TDR-4-03-A with error - dsp programs rebooted.

Ex.5 Ptoblem with TDR-0-00

  • Description: Failure of TDR-0-00. Doesn't respond to any command. Even reboot doesn't work. Switched ON the JINF brother and tried to BOOT in ROM monitor (command 40) using TESTjmdc (selecting the routing through JINJ-0). It worked.

The suggested procedure in case of board failure is the following

  • reset errors (if any). If the board has reached the maximum number of errors, it might not respond, not even reboot.
  • boot command, without parameters
  • load configuration
  • check if trigger is ok before starting a new run
Edit | Attach | Watch | Print version | History: r7 < r6 < r5 < r4 < r3 | Backlinks | Raw View | WYSIWYG | More topic actions
Topic revision: r7 - 2011-08-08 - CeciliaPizzolotto
    • Cern Search Icon Cern Search
    • TWiki Search Icon TWiki Search
    • Google Search Icon Google Search

    Main All webs login

This site is powered by the TWiki collaboration platform Powered by PerlCopyright & 2008-2019 by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding TWiki? Send feedback