To reset the bit flip is a quite easy operation, let's consider as example the bit flip observed on February 18th 2013, on the 14th bit of the strip 145 of TDR-1-23:

1. go to the directory /pocchome/tracker/TrackerExpert/JMDCCommander/bit_upset

2. exec the script giving as argument the run number of the "wrong" calibration, as in the following example: ./ 1360970700

3. The script give you back the TDR and the strip with the problem, in this case: --- HwId 123 has strip 145 (0x0091) with bit 14 set-up (on S)

4. Go to directory /pocchome/tracker/TrackerExpert/JMDCCommander

5. check that command_path.conf contains the correct configuration to send commands: eas:hosc feplr or eas:hosc pcposp0

6. Prepare the command to send, in this case the command to be sent is:

./Commander TDR-1-23 54 2 4000 91 1

that is

TDR-1-23 the TDR with problem

54 2 the command to set the bit status to 0

4000 the bit in exadecimal (in this case, we have the bit 14 set-up, so the word in binary code is 100000000000000, that in exadecimal is 4000)

91 number of the first strip in exadecimal to be affected

1 how many strips will be reset

7. Ask the Lead to stop the run before equator and restart after the bit reset with a calibration

8. Once you got a "GO" from Lead, exec the command prepared

9. report the operation in the Elog in the following way:

044/17:28 Tracker: Reset bit upset on bit 14th, side Y, TDR-1-23 (DD)

where (DD) are your initials

10. report the operation in the file /pocchome/tracker/TrackerExpert/JMDCCommander/bit_upset/bit_upset.txt in the following way:


123 has strip 145 (0x0091) with bit 14 set-up (on S)

./Commander TDR-1-23 54 2 4000 91 1

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Topic revision: r4 - 2013-12-30 - MauraGraziani
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