GUI Tool
The GUI version of the Transfer Data tool generates one HCOSS log file per GUI session when you have set the Type of logging to do HCOSS option to either Write log messages just to file or Write log messages to both console and file. It also generates one SSIS log file for each table processed, regardless of the Type of logging to do setting.
MFDataTransferCtlr Command
When running the Transfer Data tool from the command line, HCOSS generates a transfer data log file when you have set the TYPELOG directive to either FILE or BOTH, and when TYPELOG is not specified, defaults to the value of the Type of logging to do HCOSS option. It also generates one SSIS log file for each table processed, regardless of the TYPELOG setting.
Transfer Data Log Files
logFileDir\DataTasks
where logFileDir is the value of the Directory to write log files to HCOSS option.
SSIS Log Files
genHCOSSFiles\DataTasks
where genHCOSSFiles is the value of either the Local HCOSS Directory or Shared HCOSS Directory HCOSS option, depending on whether your data task is local or shared.