Solution or Workaround
Running CLEAN on a large coverage fails with this message:
Cannot write record, disk full, read only, ...(MX)
Most likely, there is not enough disk space available to process the coverage.
CLEAN, BUILD, and all of the OVERLAY module commands require at least 10 to 15 times the coverage size in disk space be available for temporary processing.
Delete all the temporary files (T$ prefix) to free up disk space. Re-run the desired ARC command.