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Dell EMC PowerVault MD 34XX/38XX Series Storage Arrays Administrator's Guide

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Trace buffers

Trace information can be saved to a compressed file. The firmware uses the trace buffers to record processing activity, including exception conditions, that may be useful for debugging. Trace information is stored in the current buffer and can be moved to the flushed buffer after being retrieved. Because each RAID controller module has its own buffer, there may be more than one flushed buffer. The trace buffers can be retrieved without interrupting the operation of the storage array and with minimal effect on performance.
NOTE: Use this option only under the guidance of a Technical Support representative.
A zip-compressed archive file is stored at the location you specify on the host. The archive contains trace files from one or both of the RAID controller modules in the storage array along with a descriptor file named trace_description.xml. Each trace file includes a header that identifies the file format to the analysis software used by the Technical Support representative. The descriptor file contains:
  • The WWN for the storage array.
  • The serial number of each RAID controller module.
  • A time stamp.
  • The version number for the RAID controller module firmware.
  • The version number for the management application programming interface (API).
  • The model ID for the RAID controller module board.
  • The collection status for each RAID controller module. If the status is Failed, the reason for failure is noted, and there is no trace file for the failed RAID controller module.
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