Hi,

a Network with a remote probe had no internet-access for two days. The time the remote probe couldn't reach the prtg server is shown blank in all graphs an the tables. Shouldn't the remote probe store some data an send it to the server when reachable again? On the Server with the remote probe, there are no logs in C:\Documents and Settings\All Users\Application Data\Paessler\PRTG Network Monitor\Logs for exactly that time. Is there a possibility to recover that data?

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Attention: This article is a record of a conversation with the Paessler support team. The information in this conversation is not updated to preserve the historical record. As a result, some of the information or recommendations in this conversation might be out of date.

This might be just a caching issue. Please try the following:

  • Stop both PRTG services (core and probe).
  • Head to your data folder (can be discerned from the PRTG Server Administrator tool, under the Core Server tab)
  • Delete the PRTG Graph Data Cache.dat file
  • Restart the PRTG services
  • Log in to the Web GUI
  • Go to Setup | System Status and check the background tasks. It should state that it is calculating historic data

Then,

  • Refresh the page from time to time (is the number being reduced?)
  • Let it run until it is done and then take a look at the historic data of your sensors - it should now be available

Mar, 2013 - Permalink