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use "serverStat <DAQ device alias>" to check on the health of the node. Most likely it is prudent to power-cycle this node. Does this not help, you should power cycle the detector/camera/device itself as well. If the problematic detector is a big CsPad, please note that after you turn the detector off, you will need to also power cycle the concentrator as it will not see all the quads when you power up again!
check the status of the data moving here: Data Mover Monitoring, this page can be seen one the main "pswww" page as well. Take our the nodes with the issue, assuming your problem is limited to a single node. If it's wider spread, it might warrant a call.
"serverStat" at this moment lives are /reg/g/xpp/scripts, but should work in all hutches. A better place for common scripts will created & populated soon.
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