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The following list contains the files that help you to recover from a crash. All of them are versioned. They can be found in /online_dir.
| online.dev | The device list. A binary file which is created on image exits. |
| online.gra | An ASCII file that contains the device list in human readable form. It is created on image exits. |
| online.log | The log file. Inspecting it may help you to understand what was happened. |
| motor_positions.bck (VME) | The motor positions as calibrate commands. This file is updated after every completed move. |
User Action:
| Save: | Copy /online_dir/motor_positions.bck (VME)
and /online_dir/online.gra to save places, e.g.:
~/temp/mp.gra and ~/temp/ol.gra. Both
files are human readable. Look into them to make sure that
both files contain reasonable contents. If the contents of a
file is corrupted, save an earlier version.
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| Check device list: | Make sure that the size of the device list did not change: ls -alt /online_dir/online*.dev. |
| Device list ok: | Start ONLINE and let cmr(), called from exp_ini.exp, fix the motor positions. Section 13.16.3 explains how it works. You may inspect online.log to see what has been done. |
| Device list corrupted: | If you decided that the
most recent device list is corrupted, you may start ONLINE
without loading a device list (edit exp_ini.exp),
then execute the saved
version of online.gra, ~/temp/ol.gra,
to restore the device list. This is done by:
$ cd ~/temp $ online ONLINE> run ol.gra
VME: Execute the saved version of
'motor_positions.bck',
ONLINE> run mp.gra After this is done, all motor positions are correct, except for those motors which were moving while the crash occured. CAMAC: Inspect online.log to determine the current motor positions. If you lucky, only a few motors have been moved since the last ONLINE session. Calibrate the motors by hand.
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