Dear Chien-Chia, you'r right , thank you very much.
I didn't read the user's guide, but only refer to the vscsiStats help:
- If successfully started, log channel id(s) will be printed out.
To store the command trace in a file for later processing, invoke:
$ logchannellogger <log_channel_id> <binary_trace_file>
without converting the <binary_trace_file> into csv file, resulting to the mentioned problem.