Note: For information on creating a CDL, see the Hard Partition Popup Context Menu, and CDL File Dialog Box.
Console Log Data (CDL) file support provides a way to save an error state when critical errors occur on an AlphaServer partition. The data saved is retrieved from the MBM and forwarded by the SRM console to the Operating System, which places it into the binary event log. The OS can create and save the file only when it is up and running.
Using AMU, the CDL log can be retrieved and saved no matter the state of the operating system or partition. Only the PMU and associated MBMs need to be active for this error state retrieval to work.
Once CDL files are generated, they can be loaded into the System Event Analyzer (SEA) for error analysis.
When you create a CDL, AMU creates a new file if one does not exist. New CDL data is always appended at the end of the file. All the CDL data returned by the MBM firmware together with an event log header, event log terminator subpacket, and event log trailer are written into the file every time the user asks for CDL data and the response contains at least one entry. Nothing is written into the file if there is no data returned by the PMU.