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                          VIA VT6421 Diagnostic Tool
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dig6421 [/? /H /LOG=filename /ERRORLOG=filename /DEV=0[,1,2,3]]

/?                           See the usage help
/H                           See the usage help
/LOG=filename                Append test result to filename
                             If file not existed, create it
/ERRORLOG=filename           Append test result to filename when error occurred
                             If file not existed, create it
/DEV=0[,1,2,3]               Only test the specific device
                             0 - SATA Channel 0 HDD
                             1 - SATA Channel 1 HDD
                             2 - PATA Master HDD
                             3 - PATA Slave  HDD

